2x Rear Lift Blocks with 3/4" Pin4x Electrostatic Powder Coated U-BoltsInstallation HardwareNotes:? DESIGNED FOR MODELS WITH SINGLE 3/4th AXLE PIN HOLES. ? The included U-Bolts will fit only Models with 4" Rear Axles.? Please check you rear suspension setup before ordering.We are proud to introduce our New Heavy-Duty Steel Lift Blocks, precision engineered by our experts not only to lift your truck but to improve your ride quality and comfort as well as lifetime use.The 1" Heavy-Duty Steel Blocks are constructed from one solid block of Steel, while the 1.5" and 2" Rear Lift Blocks are precision machined from ONE 1/4" thick plate of Steel, 3 times bend and precision welded using heavy-duty GMAW seam and fillet welding processes to ensure maximum strength and a lifetime of dependability under even the most extreme riding conditions. To maximize their strength and resistance to deformation, we reinforced the structure of these blocks with a 1/4" thick CNC plasma cut center support structure, completely welded to the frame.These blocks can withstand an astonishing load of almost 60,000 lbs with no yielding or deformation observed!Our extended U-bolts rise to expectation by being ISO 9001 certified and stamped and exceed current standards in the auto industry. Supreme Suspensions High-Strength Steel U-Bolts are bent & threaded to exact specifications, and finished with an Electrostatic Powder Coating to ensure the maximum level of protection and corrosion resistance. Especially engineered for off-road and heavy duty applications, these U-bolts will restore the clamping force on your spring assembly, maximizing safety and ensuring that you get the most out of your rear lift.Note: *An alignment is always recommended after altering the height of your vehicle.