Diameter Ø190mm, maximum cutting depth 34mm High performance - The hole saw uses a heat-treated M42 bimetal saw blade and the cutting part is made of high-quality high-speed carbon steel. The product has the advantages of high temperature resistance, no deformation and long service life. The sawtooth cutting design adopts the circular arc design with high concentric precision, uniform tooth edge, impact resistance and drop resistance. Equipped with a non-binding thread edge for easy drilling, the drill spring automatically pushes the disc out of the saw. Widely used for metal steel, castings, aluminum alloy, plastic and other metal pipe joints, galvanized pipes, fire hoses, various woods, gypsum boards, etc. Applicable to: bench drills, drilling machines, pistol drills, various hand drills, etc. Note: If you use the hole saw set for a long time, please control the speed properly, rpm ≤ 1000, otherwise it will easily cause rapid wear of the hole saw. Note: The data is all measured