105mm 4-1/8" M42 High Speed Steel Bi-Metal Hole Saw Drill Bit for Wood Plastic 2mmx20mmx110mm * Finish: Matte Black

* Finish: Matte Black

acid and alkali resistance

The Shunt is used to multiply the measuring range of current of measuring

Specification: Total Width: 38mm/ 1

105mm 4-1/8" M42 High Speed Steel Bi-Metal Hole Saw Drill Bit for Wood Plastic 2mmx20mmx110mm * Finish: Matte BlackThe 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