Detailed Product Description universal drill set, multi drills for all applications NEW & PATENT 1. iron, stainless, copper, aluminum, steel (4mm thick)2. tile, porcelain, pottery, ceramic3. glass, mirrors4. plastics and synthetics5. wood, laminates, composites6. brick, blocks, mortar, concrete QFG4-6T: 3/8'' 1/2'' 5/8'' 3/4'' 7/8'' 1''10mm 12mm 16mm 18mm 22mm 25mm