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 40mm, and the maximum cutting depth/thickness is 25mm HIGH PERFORMANCE-The hole saw adopts M42 bi-metal saw band processed 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, which is easy to cut. After drilling, the drill spring will automatically push the disc out of the saw. WIDE APPLICATIONSuitable for metal pipe fittings such as metal steel, castings, metal alloys. aluminum, plastic plates, galvanized pipes, fire-fighting pipes, all kinds of wood, plasterboard, etc. Suitable for: bench drills, pillar drills, gun drills, various hand drills, etc. NOTEWhen using the hole opener kit for a long time, please control the 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 40mm hole saw, bimetal cutting tool Use to drill wood, iron, aluminum alloy, etc. Specification: < p>Material: M42 HSS steel Cutting depth: ~25mm Total bit length: ~80-100mm Please note: 1. Should work with electric drill, here is not included. 2. Be careful not to skip blades when using a hole saw, it can ruin your case finish. Package includes40mm Hole Saw Set