1,Multiple Adjustable Diameters: This multi-diameter adjustable 4.5-5.5 inch woodworking drill can use a single tool to cut holes of different diameters, saving money and space.2,Easy to Use: No complicated instructions for use. The stepless adjustment only needs three steps: loosen and adjust, grasp.3,Clean and Fine Cutting: Three three-tooth cutter can easily cut dry walls and cork boards, and their special straight serrations clean and fine cutting. Triple cutter design, straight round effect, smooth cutting without burrs.4,Multi-: Widely used for woodworking openings, spotlight openings, plastic board openings, speaker openings, etc. but not for glass and metal.5,Compatible Tools: The hole saw is about 10 mm, suitable for all standard electric drills and cordless screwdrivers. Note: The cordless screwdriver is only suitable for drywall drilling, while the electric drill can be used for drywall, oriented strand board, cork, plywood, etc.Suitable for all kinds of drywall materials.Compatible tools: electric drill, cordless screwdriverCutting depth: about 30mm/11.81 inchShaft diameter: about 8.5mm/3.35 inchProduct diameter: about 15.5cm/6.1 inchShaft length: about 25mm/0.98 inchMaterial:Nylon + zinc aluminum alloycolour:Silver+blackPackage Contents:1 * Adjustable Punching Saw3 * Cutter1 * Positioning Drill (use range 0.6cm)1 * Hex WrenchOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.