Uxcell a15090900ux0705 6 mm Dia Spear Point Head Ceramic Marble Tile Glass Drill Bit 20 Pcs (Pack of 20) Product type : Switch Net Weight: 255g; Package Content: 20 Pcs x Glass Drill Bit Product Name: Glass Drill Bit; Shank Diameter: 5mm/ 0.2" Material: Metal; Type: Spear Tip Color: Silver Tone