Wichard Stainless Steel Key Pin Shackle With Self-Locking Pin Stainless Steel Key Pin D Shackle with Self-Locking Pin ( Middle Bar Not Included ) Pin Size: 3/16" Model # WIC 1432 - Interior Width (B): 1/2" Interior Length From Pin To Top (A): 1 7/16" - Interior Length From Bar To Top (C): 15/32" Safe Working Load: 1,100 lbs. - Breaking Load: 2,450 lbs. - Material: 316L S.S.