Variety: Suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic
Different sized shanks: Tri-flatted shank ensure compatibility with chuck sizes. Field construction, a ladder drill for a variety of specifications
Unique ladder structure: a bit can open a variety of sizes and aperture, a ladder drill on a box of drill bits.
Double spiral groove, fast chip removal?Minimal shocks and almost impossible to snap compared to conventional bits
TWO KINDS OF CHIP SPACE: It can be divided from 5 steps to 13 steps , divided into straight grooves and spiral grooves.