Twist Drill Bits Set, 60 Piece 1#-60# Nitride Coated Numbered Drill Bit Set HSS Shank Twist Drill Bits with Box (0.040' - 0.228') Fit for : Through heat treatment, stainless steel, tool steel, and other workpiece that are difficult to process, can be processed by the Nitride Coated Drill Bit Set Premium Material : 60Pcs HSS Twist Drill Bit Set adopt high speed steel, 118 degree standard points, straight shank Versatile Usage : The HSS Twist Drill Bit can be used in manual, electric hand-held drilling tools, milling machines, lathes and more Description: A twist drill is a tool that cuts a round hole of a workpiece by rotary. It is named after its flute shaped like a spiral. Twist drills can be used in manual, electric hand-held drilling tools, milling machines, lathes and even machining centers.
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