[Package Includes]: Besides a full set of drill bits, we also offer 2 blades and 2 center drill bits. Increases the life of the drill. It is convenient to replace the blades when the old blade is dull. [High Quality]: This circular hole saw is made of high quality carbon steel and alloy, with fine workmanship, smooth rotation. Very easy to use and durable. [Adjustable hole distance]: With an opening hole distance of 30mm-200mm, this circular hole saw can be controlled freely (30mm distance is not marked, adjust the knife to the most close, i.e. 30 mm away), so you can adjust the hole distance according to your needs. [Detachable blades]: The blade can be disassembled freely, easy to adjust. It can cut thin or ultra-thin metal plate, it can effectively improve work efficiency. [Wide Application]: Adjustable circle cutter perfect for decoration, aluminum plate, plasterboard, plywood and other three thin plate, a variety of lamp installations. Alloy Adjustable Circular Hole Saw with 20-300mm Hole Pitch Woodworking Tools for Wood, Plastic, Plasterboard Features: --Drilling round holes, cutting holes smooth, smooth without burrs, roundness effect. --The alloy steel holder features marked graduations for quick measurements and precise cutting. --Suitable for: solid wood, Densty panels, MDF, plywood, laminates, composites, rubber, plastic and more. Specification: Material: carbon steels + alloy Color: silver Opening hole distance: 30-200mm (The distance of 30mm is not marked, adjust the knife to the nearest, that is, at a distance of 30mm) Warning: When using a metal hole opener, pay attention to safety, pay attention to eye protection.