ITEM NAME:4Pcs 6-12Mm Triple-cornered Drill Bit Tiling Cement Multi Purpose Ceramic W F6F3 4Pcs 6-12Mm Triple-cornered Drill Bit Tiling Cement Multi Purpose Ceramic W F6F3 It is not easy to see the phenomenon of punching and slipping Smooth opening Alternative Triple-cornered drill Surface finishing drill Large groove of the drill tip for smooth chip evacuation Type: Core Drill Bit DIY Supplies: Tiling Use: Metal Drilling length: 6mm/8mm/10mm/12mm Model number: e Nail Drill Bits Metal Drill Working.DIY Supplies: Tiling. 1x123 12mm drill bit. length: 6mm/8mm/10mm/12mm. Working Conditions: Applied to hand drill, impact drill, tapping machine. Large groove of the drill tip for smooth chip evacuation.