OTC 1931 3-5/8" Spanner Wrench
 
Six-lug, spanner-type wrenches remove and install rear wheel bearing locknuts. They're built for use with a ¾" square-drive ratchet or breaker bar. Wrench for servicing Chevrolet and GMC 15,000 lb. axles; 17,000 lb 2-speed axles; 15,000 lb trailing axles.
Specifications:
Socket Outside Diameter | 3-5/8"
Weight | 3 lbs, 14 oz.