This set includes two Alpen Keramo Extreme drills for precision drilling in porcelain and granite tiles. Brand : Alpen Set Contents : 6.0mm Tile Drills (2 pieces) Application : Suitable for all tiles, especially porcelain and granite Machine Compatibility : Designed for cordless machines, 18V combi drills (rotary only) Optimum Performance : Use low-speed setting with firm pressure Durability : Natural cooling between holes extends drill life