Replace your factory u-bolts with these zinc plated corrosion resistant Tuff Country 57750 Toyota u-bolts and 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: 2007-Present Toyota Tundra 4WD (Lifted w/1.25 inch blocks) 1979-1985 Toyota Truck 4WD (Lifted w/ springs or add-a-leafs) 1984-1985 Toyota 4Runner 4WD (Lifted w/ springs or add-a-leafs) Tech Specs: Bolt Diameter: 9/16 Inch Inside Diameter: 2.5625 Length: 5.625 Inch Bend Type: Square