Forstner Bit has an excellent lifespan for drilling accurate-fit holes

A short centring tip with two main and one periphery (toothed-edge) cutting edges enable smooth splinter-free drilling
Large chip-free zones for optimised chip removal and fast drilling accuracy
3-sided shank prevents spinning in the chuck. Manufactured to DIN 7483G, 50 HRC (min) cutter hardness
The Forstner Bit's 3-sided shank prevents spinning in the chuck. It is manufactured to DIN 7483G, cutter hardness is 50 HRC minimum.

It is intended for use with all drills (drill drivers, drill stands) with a 10-mm chuck.