Features: Professional and practical design, beautiful appearance, easy to carry and use. Perfect for installing locks, knobs in doors and cabinets or drilling larger diameter holes through desks etc The whole is heat-treatment, high hardness, durable. It is used for opening holes in metal, stainless steel, iron, aluminum alloy, and so on. Each edge is a part of the characteristics of the cutting work, making the hole is not easy to produce the phenomenon of collapse Made of premium material with high hardness, abrasion resistant and long lasting. Specification: Type:Hole saw Cutter Outside diameter Size: 60mm / 2.4in,65mm / 2.6in,70mm / 2.8in,75mm / 3in(Optional) Package list: 1 x Hole saw Cutter 1 x hex wrench 1、Professional and practical design, beautiful appearance, easy to carry and use. 2、Perfect for installing locks, knobs in doors and cabinets or drilling larger diameter holes through desks etc 3、The whole is heat-treatment, high hardness, durable. 4、 It is used for opening holes in metal, stainless steel, iron, aluminum alloy, and so on. 5、 Each edge is a part of the characteristics of the cutting work, making the hole is not easy to produce the phenomenon of collapse