The Stinger Battery Service Tool Kit, Contains 7 useful and necessary tools for any shop or marina application. The tools are shipped in a convenient vinyl impregnated cloth tool roll with ties for easy storage. The Spring Loaded Battery Terminal Puller Makes One Handed hook-up a snap. The 4 way battery terminal cleaner burnisher actually refinishes the battery post and battery terminal by scraping away debris and corrosion as well as lead burrs and imperfections to make a smother battery terminal connection. The 3 ratchet wrenches are heavy duty and reversible and have a rubber coated handle for comfort and durability. A set of battery terminal pliers are included and the brass brush is double duty with stiff bristles to clean the most stubborn terminals. Over all, the OTC 516508 is a fine addition to any tool box and an even better value. Keep This One Stored With Your Battery Charger For Convenience.