This lift kit will raise the rear of your GM SUV by a true 1". Can be installed in about 1 hour and does not require any special tools. They are CNC machined out of billet aluminum and then anodized black to match you factory suspension. The quality of this kit cannot even be compared to welded spacers that crack over time. These spacers are the strongest on the market and come with a 100% satisfaction guarantee and a lifetime warranty. It will come to you complete with all the hardware and instructions.