OTC's Six-Lug Tubular Spanner-Type Wrench removes and installs rear wheel bearing locknuts on heavy-duty axles Heavy-duty tool is designed for use with a 3/4 inch square-drive ratchet or breaker bar For use when servicing Chevrolet and GMC 5,200 to 7,200 lb. axles Socket has a 2-5/8 inch O.D.