2mm cutting depth, accurate, fast and clean holes Replaceable pilot drill, fits standard chucks, complete with Arbor Lasts 10 x longer than standard Bi-Metal holesaw when cutting sheet metal Fast and clean cutting, suitable for drilling sheet metal, steel pipe, stainless steel, aluminium and fibreglass reinforced synthetic materials Contains 16, 20, 22, 25, 32, 40 and 50mm HSS Hole Cutters complete with arbors plus 2 spare pilot drills and hex keys