Bi-Metal Hole Saw 115mm (4-1/2") M42 HSS (High Speed Steel) Hole Saw Drill Bit Cutter for Wood Plastic Metal Sheet Plasterboard 2.1x35mm resisting abrasion and high cutting

resisting abrasion and high cutting temperature

adhesive backed black closed cell foam insulation

Finish: Chrome Plated

Use a marker or hole punch to mark the exact location

Bi-Metal Hole Saw 115mm (4-1/2") M42 HSS (High Speed Steel) Hole Saw Drill Bit Cutter for Wood Plastic Metal Sheet Plasterboard 2.1x35mm resisting abrasion and high cuttingThe 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