Features: 100% High quality and Brand new. Product Name: Multi-functional Triangle glass Drill Carbide Tip: YG6XImported ART carbide tip Diameter: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm This bit for the Hard Brittle Ceramic Materials such as ceramics,tiles,Marble,Concrete, glass, alu, metal sheet and so on Package Contents: 4/6/8 Pcs × (Black/Blue/Orange red) triangle Drill Bits Notice: 1)IT MUST BE ADDED COOLANT (water) WHEN IT IS BEING USED. 2)Please allow 1-3mm differs due to manual measurement. 3)Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.