The Milwaukee 8mm multi material drill bit for drilling tough materials including; concrete, bricks, roof tiles, thin metal, ceramic, tiles, wood, PVC, aluminum, drywall and more. This is a 4mm diameter drill bit compatible with impacts, drill/drivers, and hammer drills. The Milwaukee ShockWave multi-material drill bits provides the ideal all-in-one solution for the widest variety of materials, tools, and applications. The best multi material drill bit by Milwaukee can be used with a Milwaukee impact driver thanks to it's 1/4" hex shank reception.