Agency 6 2.5in Shackle Block Assembly Blue. Note: This assembly includes a shackle rated at 13000 lbs. Do not exceed the lowest Working Load Limit (WLL) of any component (ex: vehicle hitch receiver etc). Specifications for Agency 6 2.5in Shackle Block Assembly: Manufacturer: Agency 6 Fabric/Material: 6061-T6 Aluminum Finish: Powder Coat Features of Agency 6 2.5in Shackle Block Assembly Innovative block design has a working load limit of 19000 lbs capable of standard recovery ops in off road situations. Fits 2.5 inch receivers and 7/8in D-rings. Package Contents: Agency 6 2.5in Shackle Block Assembly Agency 6 SB2.5-A-BLU: 2.5in Shackle Block Assembly Blue