Description Cross Chain HookWire size: 5/16" (.312")For use on medium and heavy truck twist link and square link alloy tire chainsUsed on the following: 2233CT â 2249CT, 2829CT â 2849CT, 3227CT â 3251CT, 3827CT â 3829CT, 4239CT â 4249CT, 4839CT â 4849CT