No. 48364 - Maximum size of Grade 43 Chain 1/4", of Grade 43 Chain 1/4". Minimum Breaking Load 7,750 pounds. No. 48365 - Maximum size of Grade 80 Chain 5/16", of Grade 43 Chain 3/8". Minimum Breaking Load 19,000 pounds. No. 48366 - Maximum size of Grade 8 0 Chain 3/8", of Grade 43 Chain 1/2". Minimum Breaking Load 33,000 pounds. Turnbuckle style ratchet binders offer all steel construction, drop forged steel components, acme threaded screws, rust proofed, double-acting, spring loaded pawls offering infinit e adjustment. Made to bind difficult loads such as industrial machinery, steel erection, etc. Over-sized eyebolts and steel barrels provide extra strength to support loads. Drop forged high quality steel used for handles, barrels, eyebolts,