Features Adjustable Diameter and Space Saving: Cut holes of different diameters with just one tool, ranging from 45-130mm, saving money and space. Fine and Smooth Cutting: Three toothed blades ensure fine and clean cuts with a smooth cutting effect and no burrs, suitable for drywall and cork boards. Easy to Operate: Adjust the diameter of the hole with 3 screws, making it simple and straightforward to use without complicated instructions. Applicable Scene: Specially designed for cutting solid board, compressed board, drywall, and plastic, making it suitable for various home projects such as woodworking and DIY speaker openings. Compatible Tools: Suitable for use with all standard drills and cordless screwdrivers, providing versatility for different drilling needs ranging from drywall to plywood. Features: 1、ADJUSTABLE DIAMETER AND SPACE SAVING: This woodworking drill has a variety of adjustable diameters from 45？130mm. Cut holes of different diameters with just one tool, saving money and space 2、FINE AND SMOOTH CUTTING: Three three toothed blades can easily cut through drywall and cork boards, and their special straight toothed serrations ensure fine and clean cuts. Triple blade design, possess straight round effect, smooth cutting, no burr 3、EASY TO OPERATE: No complicated instructions for use. Loosen the 3 screws in the middle, then adjust the diameter of the hole you want, and finally tighten the 3 screws to start drilling 4、APPLICABLE SCENE: This hole saw bit is specially designed for cutting solid board, compressed board, drywall, plastic, etc. Suitable for home projects. Widely used for woodworking openings, spotlight openings, plastic board openings, DIY speaker openings, etc., but not suitable for glass and metal 5、COMPATIBLE TOOLS: All standard drills and cordless screwdrivers will accept 10mm hole saws. Cordless screwdrivers are only suitable for drilling drywall, while electric drills can be used for drywall, OSB, cork, plywood, etc. Specification: Item Type: Adjustable Hole Saw Material: ABS, aluminum alloy, carbon steel Diameter That Can Be Drilled: Approx. 45 ~ 130mm / 1.77 ~ 5.12in Package List: 1 x Adjustment Disc 3 x Saw Head 1 x Center Drill 4 x Screw 2 x Hex Wrench Package List 1 x Adjustment Disc 3 x Saw Head 1 x Center Drill 4 x Screw 2 x Hex Wrench