Six-lug, spanner-type wrench remove and install rear wheel bearing locknuts. They're built for use with a 3/4 square-drive ratchet or breaker bar. Wrench for servicing Chevrolet and GMC 15,000 lb. axles; 17,000 lb. 2-spd. axles; 15,000 lb. trailing axles. Socket O.D. is 3-5/8.
