Durable - Hole saw kit is made of HSS high speed steel, with extremely sharp blade, low consumption and durable. Made From HSS - The gears is made from HSS and the rigidity varies from the hole saw has a twist drill bit inside, which is undetachable. Long Life - Anti-cutting with lower consumption make the product a long service life. Fast Cutting - Suitable for hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine. Multi-Purpose - Perfect for installing knobs, locks and cutting holes in wood, soft steel, etc. Features: High speed steel material,durable and practical. Triangular shank design prevents bit slippage and stable operation. Sharp teeth,computer indexing,high speed grinding,high precision,less hole opening error. Drill wall thickness 2mm, increase the service life of the drill. 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. Application for Thin metal, iron plate, channel steel, aluminum alloy. Material: High Speed Steel Outside Diameter: 25mm/0.98in Length: 65mm / 2.55in(Approx) Optimal Rotational Speed: 280~300r / min Package Weight : 66 G / 2.33 Ounces Color: silver, black Package Include: 1 x HSS Hole Saw Cutter Drill