Feature1Regulable Diameter: This punching saw has a variety of regulable diameters from 45130 mm. Save money, labor and space by cutting holes of different diameters with just one tool.2Fine and Clean Cutting: Three of 3 tooth blades can easily saw through plasterboard and cork board with its special straight teeth to ensure fine and clean cutting. Triple blade design, straight round effect, unhindered cutting, no burr.3Easy to Use: No complicated instructions for use. Loosen the 3 screws in the middle, then adjust the diameter of the hole you want, and finally tighten these 3 screws to start drilling.4Compatible Tools: All standard electric drills and cordless screwdrivers can accept 10mm hole saws. The cordless screwdriver is only suitable for drilling holes in plasterboard, while the electric drill can be used for plasterboard, oriented strand board, cork, plywood, etc.5Multi Purpose: This hole saw cutter is designed for cutting compression board, gypsum board, plastic, etc. Suitable for home projects. Widely used for woodworking hole cutting, plastic board hole cutting, DIY speaker hole cutting, etc., but not for glass and metal.Item Type: Regulable Punching SawMaterial: ABS, 45 steelOpening Diameter: Approx. 45-130mm / 1.77-5.12in Package List1 x Dust Cover1 x Regulable Hole Saw1 x Connecting Rod1 x Center Drill1 x Hex Socket Wrench1 x Storage Box (With Fixing Screws)Note1. Manual measurement may have error. Please make sure you don't mind before ordering.2. Due to differences in different monitors, the picture may not reflect the actual color of the item. Thank you!