3/4/5/6/8/10/12mm Triangle DIY Glass Drill Bit Set Ceramic Cross Hex Bench Drill Bits Hole Opener Craft for Woodworking Repair ToolFeature:It is preferable that alloy steel materials are higher than ordinary drill bit and wear-resistant. The incision is small and the punch is accurate. The surface of the drill bit has been undisturbed, and the drilling resistance is smoother. The drill shank is cut into six angles to make the electric drill chuck more tight, and the drilling is not easy to slip. Specification: Material: hardware milling cutter with steel headColor: blackSpecifications: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mmSuitable for: glass, ceramic, glass, marble, red brick cement wall, all porcelain tile, wood, plasticSuitable for models: lithium electric drill, handheld electric drill, bench drill. Note: A lithium drill below 24V is not recommended and it is not enough to fight. The punch encounters a steel rod to change position, otherwise it will save the blade. Glassy bricks, all porcelain porcelain tiles, granite needs to cool down. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow the measurement deviation about 1-2cm due to manual measurement. 1 X Drill Bit