Made with high quality of raw material through special heat treatment ,especially, tungsten carbide of tapered button bits are from Boart long year, widely applied in Hand Hold ( short-hole) drilling system for dimensional stone quarrying.

Tapered button drill bit specifications :

Type:Tapered button bits

Shank Hex.Size: 19mm,22mm,25mm

Diameter: 30-42mm.

Taper degree: 4°6°7°11°12°

Package:in wooden case or plastic case.

Productivity: 10000pcs/month

Tapered button drill bits are widely used for drilling hard or very hard work.