WHAT YOU WILL GET1 x Bi-metal hole saw blades, 1 x chucks, 1 x drill bits, 1 x storage box. Each hole saw kit is individually packaged, the diameter is 100mm and the maximum cutting depth/thickness is 25mm HIGH PERFORMANCE-The hole saw adopts processed M42 bimetal saw band thermally 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. CUTTING DESIGNThe sawtooth adopts arc design, concentric precision, uniform tooth edge, impact resistance and anti-drop. The hole saw kit adopts non-binding sharp edge design, easy to cut. After drilling, the spring of the drill will automatically push the disc out of the saw. WIDE APPLICATIONSuitable for metal pipe fittings such as metal steel, castings, aluminum alloys. aluminum, plastic plates, galvanized pipes, fire-fighting pipes, all kinds of wood, plasterboard, etc. Suitable for: bench drills, drill presses, pistol drills, various hand drills, etc. NOTEWhen using the hole opener kit for a long time, please check rotation speed appropriately, RPM1000, it is easy to cause high-speed wear of the hole opener. The surface of the product is coated with a thin layer of protective oil (anti-oxidation, anti-rust), be careful not to stain, and check the condition of the hole opener