5pcs 12mm Multi Construction Drill Bits. Uses: suitable for ceramic tile, glass, marble, concrete, stainless steel, aluminum, wood, plastic, red brick, etc. Specification:Ø 12mm. Note: Dry drilling materials (such as: iron/copper/aluminum alloy/wood/plastic/glazed brick antique brick/concrete/bubble brick/red brick), wet drilling materials (materials with higher hardness need to be drilled with water, for example, 201 stainless steel/304 stainless steel/vitrified brick/granite).
eBay