Spidertrax 1.5' thick, 5 on 5' bolt-on design for front and rear Jeep axles. The WHS010 Wheel Spacer Kit is designed specifically for the following Jeep models: 1999-2004 Grand Cherokee WJ, 2005-2010 Grand Cherokee WK, 2006-2010 Commander XK, & 2007-2018 Wrangler JK Factory machined pre-installed 4140 wheel studs. Anodized 6061T6 domestic grade aluminum alloy. Precision wheel and hub centric fit.