Features: 1. Application: Fit for 1-1/2″ (or 38mm) cap nuts. Our Porkchop cap nut wrench is designed to hold outer cap nut on dual wheels while the inner nut is turned. Lip fits in hole to secure wrench in place. Fits standard cap nuts. 2. Function: Designed to hold outer cap nut on dual wheels while the inner nut is turned. Used to break apart the cap studs and the nuts without damaging the wheels. 3. Benefits: Solves the problem of damage to wheels as well as broken toes and injuries to feet. All models have a replaceable polymer covered stopper that locks the tool securely in place. Specific professional tool for easy and quick operation. .