Standards :
HSS Straight Shank Twist Drill Bit (DIN338, DIN340, DIN1897, ASME B94.11M)
HSS Reduced Shank Twist Drill Bit (DIN338, ANSI ASME B94.11M)
HSS Taper Shank Twist Drill Bit (DIN345)
Manufacturing process:
Roll forged / fully Ground / Mill
Surface finish:
Bright / Black oxide / Black Flute / White shank / Rainbow
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