This tool holds the loaded cam from rotating while changing the belts on 4 valve Compatible for Testastretta Ducati engines. Simply slide the tool between the cam belt pulleys and slide the old belt off. Black Anodized finish provides years of protection. Works on 20 tooth sprockets. This tool is brand new. A must have tool for anyone working on a Ducati! This tool is not made in China or Hong Kong. It is professionally made in the USA on the state of the art CNC equipment with 100% quality inspection.