1、Adjustable Range: Adjustable hole saw kit, with a punching range of 1.8‑5in (45‑130mm), capable of cutting holes of different diameters with one tool, greatly improving work efficiency. 2、Chips Collection: During the process of drilling to the ceiling, it can collect most of the chips and debris, with higher hardness and toughness, greater cutting strength, and better wear resistance. 3、High Efficiency: The 3 flute hole cutter can easily cut dry wall and soft wooden board, and the straight serrations ensure clean and fine cutting, making the cutting smoother and no burr. 4、Applicable Material: This adjustable hole saw is suitable for drilling holes in wood, plywood, plastic, gypsum, acrylic board, thin metal, and other materials, widely used in home and woodworking projects. 5、Aluminum Alloy: This hole opener tool is made of excellent aluminum alloy material, has high strength, wear resistance, and long service life, and can be used in various environments.