ReadyLift 1" Rear Block Kits include 2 rear blocks, 4 e- coated U-bolts, 8 nuts and washers and will safely lift the rear of your truck an additional 1 inch. Based on OEM designs and made from cast iron, never made out of light weight extrusions.  ReadyLift block kits will put a slight rake back in your truck for hauling or towing and are designed to work in concert with your ReadyLift suspension leveling kit. This is a great tow package upgrade that allows you to fully lift your truck while maintaining the use it like it was originally intended. Installation time is about 1 to 1.5 hours