FEATURES: - 100% new and high quality.? … painted gold on the body of this bit to avoid rusting.? - great, good, no razor, no shaking phenomenon, chip easily - small incision in the resistance, stable drilling, speed, does not violate the border .? - - mainly used for drilling ceramic tile, porcelain tile, marble, granite, concrete rebar and other hard materials.? - Great for drilling mounting holes in stone faucet countertops, plumbing pipes in showers and vanities.? Usage mode: use dry or wet to prolong its life, must use with water cooling and lubricating.? the hole can be used;?with bench drill, electric drill.? when you drill them electrically, start slowly.?45 degrees, after making a first vertical mark.? specifications: materials: metal, diamond quantity: 1 pc color: gold size: 6 - 25 mm / 0.24- 0.98 cm 6/8/10/12/14/16/18/20/22/25 (mm) 0.24 / 0.31 / 0.39 / 0.47 / 0, 55 / 0.63 / 0.71 / 0.79 / 0.87 / 0.98 (cm) packaged, include: 1 x diamond hole S ’there would be a customs
