These easy to use Diamond Hole drills come complete with a self contained water supply & drill guide. Simply stick the guide with the pads supplied over the tile to be drilled turn the water on and away you go with minimum mess. Working speed between 400 and 1000 rpm. Average life between 5 and 10 holes each cutter depending on the material. Rubi Easy Gres Diamond Hole Cutting Kit contains: 1 x 6mm Diamond Hole Cutters. 1 Guide/Water tank. 10 Double sided sticky fixing pads.