JB INDUSTRIES | sku: 484211 Jb Industries Service Wrench - 484211 Reversible Ratchet Wrenches. Double Sided Square Or Square/Hex Openings. For Use On A/C System. Hex Adapter Modifies Square Opening To Hex Opening.3/16 in., 1/4 in. square x 1/2 in., 9/16 in. hex portAvailable in offset, hex and square endsFor use on A/C... Log in for pricing