200mm 7-7/8" M42 High Speed Steel Bi-Metal Hole Saw Drill Bit for Wood Plastic 74mm x 80mm Material: O-rings made of iron

Material: O-rings made of iron materials

Feature: proof dust and noise

Outer Diameter: 25mm / 0

2 x Deep Groove Ball Bearing

ID x OD: 53 x 66 mm / 2 x 2

200mm 7-7/8" M42 High Speed Steel Bi-Metal Hole Saw Drill Bit for Wood Plastic 74mm x 80mm Material: O-rings made of ironThe 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