Product size: The product is 18mm long, 0.7mm thick, and 4mm in diameter. Manual measurements, please allow slight errors. Applicability: This product is suitable for most haircutting scissors and beauty scissors. Application: This tool will adjust or trim the tension of the scissors through the external dial. It can tighten or loosen the nuts on the haircutting scissors and beauty scissors, giving your scissors a new look. Unique design: The gear-like design is very simple and stylish, and there is a small hole on the surface that allows you to fix the tool on the key ring for easy carrying. Easy to install: Just put it on the scissors, align it with the scissors screw eyes, and turn the wrench to adjust the tightness of the scissors., Manufacturer: EMSea