2004-2010 COLORADO / CANYON 4WD Maxtrac Suspension's torsion keys offer a quick and easy solution to changing the height on the front of your vehicle, for the desired stance. The installation of these keys provide additional clearance for the front of your vehicle, allowing a larger tire size. Lifting the back is accomplished by a lifting shackle or blocks. SPECIFICATIONS Forged Steel Construction 100% Bolt On Installation Increased Ground Clearance Powder Coated for long life. MAX TIRE SIZE: 31"