• Spear point, tungsten carbide bit heads. • For use with portable drills. • Best used at low rpm. • Use water to cool when drilling - failure to do so will result in premature wear and overheating. • Suitable for drilling through glass, tiles, mirrors and ceramics. Quality straight shank carbon steel drill bits for clean cutting. Tungsten carbide bit heads, suitable for drilling through glass, tiles, mirror and ceramics
