Material: Made from stainless steel with black oxidation treatment for longer service life. Adjustable Angle: The size of rotating nut can be adjusted and adjustable distance is 10-52mm. Non-slip Design: Plastic coated handle, non-slip and comfort, make your work more handy. Sturdy and Durable: The cylinder is not easy to slip or break, making the sliding claw and worm gear close to each other, can be easier to loosen or tighten the worm gear with a wrench. Application: It is suitable for changing the grinding wheel or grinding disc of various types of angle grinder, table grinder, bevel cutter and marble machine and circular saws.