Maxtrac Add to Cart MaxTrac Rear U-Bolts for 3in/4in Lift Blocks - 12.50in x 2.625in x 9/16in - Set of 4 - 910104 MSRP: $59.83 Was: Now: $51.67 Set of (4) U-bolts with thick nuts and washers. Specs are 2.63in. ID x 12.50in. long square end.