80mm 3-5/32" M42 High Speed Steel Bi-Metal Hole Saw Drill Bit for Wood Plastic 11.8x3.9x3.9inch Inner Diameter: 45mm / 1

Inner Diameter: 45mm / 1

aluminum and mild steel tubing

Package included: 2 pcs x ABS Plastic Rods

The drill press quill return spring is good replacement for many existing quill spring on drill presses

The wound tensile cords are specially engineered

80mm 3-5/32" M42 High Speed Steel Bi-Metal Hole Saw Drill Bit for Wood Plastic 11.8x3.9x3.9inch Inner Diameter: 45mm / 1The 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