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 6 Pcs. National USA 3/8" Taper Length HSS Drills US $20.00 
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 5-DRAWER DRILL CABINET #1-60 + HSS DRILLS US $102.50
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 5 HSS & COBALT S&D REDUCED SHANK DRILLS - 37/64" to 3/4" US $2.59
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 12 GREENFIELD 5/16" HSS DRILL BITS NEW US $18.00
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 15mm HSS Reduced Shank Twist Drill Bit US $12.20
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 15.1mm HSS Reduced Shank Twist Drill Bit US $12.60
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 15.2mm HSS Reduced Shank Twist Drill Bit US $12.70
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 15.5mm Reduced Shank HSS Twist Drill Bit US $12.90
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 15.8mm HSS Reduced Shank Twist Drill Bit US $13.30
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 15.9mm HSS Reduced Shank Twist Drill Bit US $13.40
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 16mm HSS Reduced Shank Twist Drill Bit US $13.40
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 16.2mm HSS Reduced Shank Twist Drill Bit US $13.60
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 16.3mm HSS Reduced Shank Twist Drill Bit US $13.70
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 16.5mm HSS Reduced Shank Twist Drill Bit US $13.70
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 16.8mm HSS Reduced Shank Twist Drill Bit US $13.80
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 17mm HSS Reduced Shank Twist Drill Bit US $13.80
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 17.5mm HSS Reduced Shank Twist Drill Bit US $14.20
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 17.8mm HSS Reduced Shank Twist Drill Bit US $14.50
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 CORE DRILL 1/4" (.250) 4FLUTE HSS GUHRING STRAIGHT SH US $7.00
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 19/32" PTD HSS Drill Bit 426 Jobber Length USA. Precision Twist Drill US $18.00
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 45/64" PTD HSS Drill Bit USA. Precision Twist Drill US $15.00
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 Tapper Shank HSS 9/16, 3/4, 17/32, 9/16 FOUR drill bits NEW US $49.00
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 2 Pcs 3.15mm Diameter HSS Electrical Center Spotting Drill Bits US $5.02
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 4 Pcs NEW Titex 5.6mm Parabolic Drills HSS US $16.00
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 2 Pcs 3.15mm Dia Lathe Drilling Hole Tool HSS Center Drill Bits US $5.37
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 AMEC 152T - 26 FB 26mm Flat bottom HSS Super Cobalt spade drill insert tip CNC US $39.49
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 Buy 144 #45 HSS Jobber Length Drill Bits & Get 144 More FREE 118° Point USA Made US $58.99
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 120 ESSANAY 1/4"X3-1/2"X12" HSS EXTENSION DRILLS NEW US $16.30
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 15/32" Drill bits with 3/8" SHANK hs hss 5 pieces US $8.75
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 115 Piece TiN Coated 3 In 1 Combo HSS Drill Set New US $56.00
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 115 Piece 3 In 1 Combo HSS Drill Set With Suitecase US $39.00
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 NEW # 5 X 6" COMBO DRILL & C'SINK HSS 60 DEGREE 229 US $4.95
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 NEW PTD 39/64" HSS BLACK JOBBER DRILL US $9.99
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 NEW PTD 27/64" HSS JOBBER LENGTH DRILL USA US $9.99
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 NEW KENNAMETAL 9/16" HSS BLACK JOBBER DRILL US $9.99
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 Buy 24 7/16 HSS Jobber Length Drill Bits & Get 24 More FREE 118° Point USA Made US $73.58
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 CHICAGO LATROBE 53178 Type 110 1-7/32" HSS Oxide 4MT Taper Shank Drill 1H US $64.95
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 Dong Woo Reamer/Drill Blanks 0.1695 Wire #18 HSS R$243 US $182.52
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 5 NEW NACHI #39 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $5.00
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 10 NEW NACHI #39 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $9.50
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 1 NEW NACHI #38 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $3.00
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 4 NEW NACHI #27 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $5.00
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 9 NEW NACHI #35 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $8.50
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 10 NEW NACHI #20 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $13.75
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 8 NEW NACHI #22 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $9.25
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 6 NEW NACHI #5 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $11.00
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 4 NEW NACHI #6 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $7.25
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 7 NEW NACHI #20 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $9.75
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 3 NEW NACHI #22 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $5.00
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 3 NEW NACHI 'S' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $12.50
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 5 NEW NACHI LETTER SIZE 'S' .348 LIST 501 TWIST DRILL BIT HSS 118° JOBBER LENGTH US $22.50
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 6 NEW NACHI #41 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $5.75
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 5 NEW NACHI 'P' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $18.25
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 10 NEW NACHI #41 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $9.50
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 6 NEW NACHI 'T' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $28.50
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 10 NEW NACHI 'A' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $20.95
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 6 NEW NACHI 'K' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $18.25
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 2 NEW NACHI 'Z' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $14.75
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 10 NEW NACHI #42 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $9.50
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 10 NEW NACHI #45 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $9.50
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 5 NEW NACHI 'Z' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $36.99
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 7 NEW NACHI 'B' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $14.75
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 4 NEW NACHI 'X' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $24.75
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 1 NEW NACHI 'O' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $4.99
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 BURCHETT INSERT S06Z08 T15 SUPER HSS DRILL (GB81) US $15.00
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 NEW NACHI 'R' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $4.99
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 7 NEW NACHI 'E' LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $13.50
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 11 NEW NACHI #45 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $10.25
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 MACHINE DRILL MILLING BITS, MELIN, HSS, SEM, TURBOMIL, OTHERS, SHARP AND SHINY US $22.50
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 5mm Cutting Diameter 4 Flutes Slot Drill HSS End Mill US $3.55
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 10 NEW NACHI #49 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $11.00
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 5 NEW NACHI #49 LIST 501 TWIST DRILL BIT HSS 118° STRAIGHT LENGTH JOBBER LENGTH US $5.50
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Hss Drills
Language Education: grammar training ineffective and rather harmful
Did you know that the average student learning a foreign language spends more time dwelling on the correct gramatical rules than on actually just seaking the language? This may just be the undoing of his or her language skills.
The problem with this: it is not only about the most ineffective way of language training, some of these elements such as translations and grammar drill are outright harmful.
Before we get into the details, please consider this: how did you learn to walk? All by yourself I believe and further you might agree that nowhere in the world there is a pediatrician or pedagogue who would advocate special walking instructions and drills for babies and toddlers (unless they were disabled). Likewise we all know that children learn their native language automatically just by listening and gradually communicating with people who are more advanced than they. By the age of six a normally developped child knows about 100,000 words in their native language if you count all word forms, e.g. go -> went, brother -> brethren, may -> might etc. Even a professor who later teaches that language as his best foreign language will hardly ever surpass such a six year old which you can easily check by asking him or her for e.g. a list of thirty types of tree or thirty species of birds, or if he knows the games and toys such child usually plays with in his native language and is accustomed to name.
So we may safely say that nature's normal way of acquiring a language is the best, simply the most effective way and that all other methods lag miles behind. While there are a many fun ways to learn a language, they're still not as effective as the simple way babies acquire their first. But there are certain widely employed methods that are outrright harmful and one of them is grammar training.
Did you ever reflect on grammar when acquiring or using your native language until the age of six? Not really, most people whose parents are accomplished speakers just pick up their parents style and vocabulary. The most important thing though is that we have certain areas in our brains that are trained to distill rules from repeating patterns, such as past tense or the plural "s" as in manner -> manners, fan -> fans, can - cans etc. This process is automatical and the correct "grammatical" rule becomes woven into the language usage pattern and then works without thinking.
But if you force anyone, esp. children, to reflect upon those rules, worse even to learn them up front, you will destroy that rule building process with the end result that your child may never learn that second language fluently but may always behave like a self-conscious and slow speaker who tries to first access his/her grammatical "rule book" that is by now saved in a completely different part of their brain.
This is known since decades, however, modern school currikcula and teacher training does not reflect that knowledge. Rather children are given assignments in their native language and challenged to translate into the target foreign language, whereby they are asked to apply those cherished rules. This is part of a series of articles where we will also cover the harm that's done by forcing children to translate early between languages. Let's just quote a few sources on grammar drill and its effects:
"Why Doesn't Grammar Correction Work? The first reason why writing class grammar feedback doesn't work is that it treats only the surface appearance of grammar and not with the way language develops ... Secondly, learning grammar in a second language is a complex and gradual process which occurs both developmentally and hierarchically (some items are acquired before others). Compounding this is the fact that the learning of linguistic items does not occur in a linear fashion, that the learning curve for an item is full of valleys and peaks, progress and regressions."
(Grammar Correction in ESL/EFL Writing Classes May Not Be Effective, Ronald Gray, Beijing Language and Culture University (Beijing, China))
The author then continues: "So what should a L2 writing teacher do? The quickest and most effective solution would be for writing instructors to simply stop making grammar corrections." And take note: "In short, teachers need to train themselves to set aside their red pens and examine ideas and see what students are trying to say instead of simply looking for grammatical errors."
"When you are just learning to speak a new language, learning grammar rules is not only senseless, but harmful as far as developing your ability to fluently express yourself. ... In most cases, our speech is formed by communication, the quantity and quality of studied literature, education, or simply our surrounding environment. During systematic simultaneous repetition, one develops an inner sense of the language, and the ability to imitate correct pronunciation of words and phrases." (Language Bridge Method)
"Teachers and students who take correction seriously face overwhelming problems, both in making the corrections effective and in dealing with the harmful side effects of the practice. Research evidence points to the conclusion that oral correction does not improve learners' ability to speak grammatically. No good reasons have been advanced for maintaining the practice. For these reasons, language teachers should seriously consider the option of abandoning oral grammar correction altogether." (John Truscott: "What's Wrong with Oral Grammar Correction", http://www.hss.nthu.edu.tw/~fl/faculty/John/What's Wrong with Oral Grammar Correction 1999.htm summed up here also: The Case Against Grammar Correction in L2 Writing Classes, Language Learning 46:2, June 1996, pp. 327-369
See also: "Theoretical Basis for the Natural Approach, Jill Kerper Mora, San Diego State University". http://coe.sdsu.edu/people/jmora/NatApprTheory-Eng/Default.htm
About the Author
Research on how to best emulate native language/first language acquisition for use in second language education is currently undertaken at Arete schools http://www.fsa-ev.de/ , a small progressive school in Germany,
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