Specification:Brand newMaterial: nylon + zinc-aluminum alloyCutting depth: approx. 30mmShaft diameter: approx. 8.5mmProduct diameter: approx. 15.5cmSet contains: adjustable punch saw + three blades + positioning bit (use range 0.6cm) + hexagonal wrenchShaft length: approx. 25mm Feature:Woodworking hole driller with adjustable multi diameters from 45mm to 130mm, makes it possible to cut holes of different diameters with just one tool.The three triple tooth blades saw through plasterboard and softwood boards with ease, and ensure fine and clean cuts with their special, straight-set toothing. Triple blade design, straight round effect, smooth cut, and burr-free.Used in woodworking opening, spotlight opening, plastic plate opening, DIY speaker opening, etc, but not for glass and metal.10mm available for all standard cordless drills.Suitable for a wide range of drywall materials.Easy to use.