29pcs HSS Drill Bits Set for Metal Aluminum
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29pcs HSS Drill Bits Set for Metal Aluminum
Product Name: HSS TWIST DRILL BITS
Material : HSS 4241
Process : Roll forged / full ground
Shank Type: Straight
Surface Finish : Bright finish / Tin Coated / black finish
Standard : DIN 338
Diameter : 1/16-1/2*1/64 inch
Features:
① The large increment of drill body makes the product not easy to break.
② The hole with thick core is easier.
③ Quenching temperature within 5 degrees temperature control, more stable quality.