KNUCKLEBUDDY® is a wrench extender that adds maximum leverage to your existing wrenches.

During the initial proof of concept ten auto shop owners tried out KNUCKLEBUDDY for 10 days. All purchased one. KNUCKLEBUDDY® has been proven to be more productive than using a second wrench that could turn or slip. 

KnuckleBuddy Wrench Extender Leverage Tool

U.S. Pat No. 9,873,194