Eibach 2894.8000 Pro-Steering Damper for Jeep JK Fits 2007-Up Jeep Wrangler JK Performance Steering Stabilizer utilizes the same gas-charged, monotube technology found in our All-Terrain-Lift shocks Designed to work with factory hardware or in conjunction with the All-Terrain-Lift Engineered to deliver improved steering response and control needed when modifying your Jeep JK Shaft Size: 16 mm (0.625 in)