These heavy duty zinc plated D-rings are made from rigid cast steel and feature a beefy 1-inch center pin. With a Working Load Limit of 13,500 lbs., these D-rings are perfect for most any recovery operation.. Galvanized 7/8 inch D-shackle pair, 13,500lb. working load limit(WLL). These are the shackles you'll need for recovering a full-size truck and Hummer.