Drilling diameter: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm Material: Ceramic Stainless Steel Carbide-tipped drills with a degree of hardness. Over HRC-90. Package included: 1pcs X 4mm Glass Drill Bit 2pcs X 5mm Glass Drill Bit 2pcs X 6mm Glass Drill Bit 2pcs X 8mm Glass Drill Bit 2pcs X 10mm Glass Drill Bit 1pcs X 12mm Glass Drill Bit ProductSiteLaunchDate : 2024-11-02T11:11:08.216Z Size : One Size UnitCount : 1