6pcs Universal Drills set 1.Size:10-12-16-18-22-25mm; 2.High ... . Drilling object: Iron, Stainless, Copper, Aluminum, Steel (4mm thickness); Tile, Porcelain, Pottery, Ceramic; Glass, Mirrors; Plastics & synthetics; Wood, Laminates, Composites; Brick ... ;3. Size:10-12-16-18-22-25mm. Universal Drills Set