20 mm Bi-Metal Hole Saw Red, M47 HSS Hole Cutter for Metal, for Wood, Aluminium, Iron Sheet Pipe, Plastic

49 hole diameters: 15 mm - 200 mm, solutions for all dimensions of the problem. Heat treated M42 HSS bi-metal hole saw: made of high-quality HSS carbon steel and bi-metal steel with sharp edges and high hardness. Strong and robust. The precision of the concentric degree, so that the teeth edge of the uniform to extend the life of the hole. Cutting design: with the non-binding design with clean edges, this hole saw cuts smoothly and easily. And the spring on the drill pushes the disc automatically out of the saw immediately after the hole is completed. Equipped with a centre connecting rod: for your convenience, we have a middle connecting rod for you. Application: suitable for cutting mild steel, stainless steel, cast iron, brass, aluminium, wood etc., ideal for installing locks, knobs in doors and cabinets or for drilling larger diameter holes through desks, etc., indispensable for carpentry decoration