229A.ST3 For precision drilling straight bores in all materials. Split point - no pilot hole required. More aggressive cut for easier drilling and no burrs. Better shaving removal. Parallel shank with 3 flats for positive rotation. Laser-engraved diameter markings in a groove. Range: 6-9-13-16-19-21-23- 26-29-32-35-38mm. Shank: 10mm.