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Drill Bits >> STEP DRILL BITS
STEP DRILL BITS

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Made by high speed steel with heat treatment.
Drill round holes in most metals,plastic,wood, and etc.
Self-starting tips will not skid. No need for center punching or pilot drill. For using electric drills and drill presses.
The titanium-Nitride Coated one increases the hardness and makes the bit last up to 4-5 times longer than ordinary drill bits.
 
H.S.S. Stock No Tin Coated Stock No. Hole Size No. of Holes Increments Shank Size
21-ST1 21-ST1T 1/8" - 1/2" 13 1/32" 1/4"
21-ST2 21-ST2T 3/16" - 1/2" 6 1/16" 1/4"
21-ST3 21-ST3T 1/4" - 3/4" 9 1/16" 3/8"
21-ST4 21-ST4T 3/16" - 7/8" 12 1/16" 3/8"
21-ST5 21-ST5T 1/4" - 1 3/8" 10 1/8" 1/2"
21-ST9 21-ST9T 7/8" - 1 1/8" 2 - 1/2"
21-ST123 21-ST123T 1/8" - 3/4" 3-Pc Set 1/32", 1/16" 1/4", 3/8"
21-ST50 21-ST50 1/8" - 1 3/8" 6, 9, 10, 12, 13 1/16", 1/8", 1/32" 1/4", 3/8"


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