Detailed Product Description Universal drill ( multi drill ) PATENT NO. ZL 01 3 11605.3 Can be used for:Iron, stainless, copper, aluminum, steel (4mm thick)Tile, porcelain, pottery, ceramicGlass, mirrorsPlastics and syntheticsWood, laminates, compositesBrick, blocks, mortar, concrete QFG4:1/8'', 5/32'', 3/16'', 1/4'', 5/16'', 3/8'', 1/2'', 9/16'', 5/8'', 3/4'', 13/16'', 7/8'', 1''3mm, 4mm, 5mm, ...