12pcs 15-50mm HSS Hole Saw Cutter HSS Drill Bits Set Features: - Durable and practical. - Provide 12kinds of SIZE H.S.S hole saw, Meet your different needs. - Perfect for installing locks, Knobs in doors and cabinets or drilling larger diameter holes through desks etc. - Cuts steel, Stainless steel, Copper, Brass, Aluminum, Fiberglass, Formica and other laminates in seconds.Material: H.S.SOutside Diameter: - 15mm/0.59in - 16mm/0.62in - 18mm/0.71in - 20mm/0.78in - 21mm/0.82in - 22mm/0.86in - 25mm/0.98in - 26mm/1.02in - 28mm/1.11in - 30mm/1.18in - 35mm/1.37in - 50mm/1.96inLength: 65mm / 2.55in(Approx)Optimal Rotational Speed: 280~300r / min Package Weight : 883 G / 31.15 Ounces Package Dimensions (L*W*H) : 80*100*70 MM / 3.15*3.94*2.76 Inches Retail Packaging: Yes, General Box