Bi-Metal Hole Saw 125mm (4-29/32") M42 HSS (High Speed Steel) Hole Saw Drill Bit Cutter for Wood Plastic Metal Sheet Plasterboard 1-1/4"x2-1/4"x1/2" Outside Diameter: 146

Outside Diameter: 146

Major components are made of aluminium alloy

directly put it on the outside of the tube

please choose the fittable size items for your packing

Bi-Metal Hole Saw 125mm (4-29/32") M42 HSS (High Speed Steel) Hole Saw Drill Bit Cutter for Wood Plastic Metal Sheet Plasterboard 1-1/4"x2-1/4"x1/2" Outside Diameter: 146The bi metal hole saw combines high speed steel and cobalt. The hole saw body is made of superior grade M42 high speed steel, which has excellent hardness, wear resistance, and heat resistance. The cutting edges or teeth are made of a cobalt alloy, which further enhances hardness and heat resistance. The sprayed coating resists rust and corrosion. Sharp toothed edges allow for smooth, fast and easy cuts. Bi metal hole saws have larger numbers of