Replace your factory u-bolts with these zinc plated corrosion resistant Tuff Country 17652 GM Truck/SUV u-bolts. Designed specifically for Lifted vehicles. This kit includes (4) u-bolts along with nuts and washers.Details: Rear Axle U-Bolt Kit Zinc plated to resist corrosion (4) U-bolts, nuts and washers Designed specifically for Lifted vehicles Made In The USA Sold As A Kit Fits: 1969-1972 Chevrolet Truck 1/2 Ton/3/4 Ton 4WD (Lifted by 3-4 inch blocks) 2001-2010 Chevrolet Silverado 2500HD 4WD (Lifted by 1-2 inch blocks) 1969-1972 Chevrolet Suburban 1/2 Ton/3/4 Ton 4WD (Lifted by 3-4 inch blocks) 1969-1972 Chevrolet Blazer 4WD (Lifted by 3-4 inch blocks) 1969-1972 GMC Truck 1/2 Ton/3/4 Ton 4WD (Lifted by 3-4 inch blocks) 2001-2010 GMC Sierra 2500HD 4WD (Lifted by 1-2 inch blocks) 1969-1972 GMC Suburban 1/2 Ton/3/4 Ton 4WD (Lifted by 3-4 inch blocks) 1969-1972 GMC Jimmy 4WD (Lifted by 3-4 inch blocks) Tech Specs: Bolt Diameter: 5/8 Inch Inside Diameter: 2.75 Inches Length: 12.875 Inches Bend Type: Square