ARB Air Lockers are specially designed to offer 100% traction on demand, without worsening your vehicle's highway driving performance. The Air Lockers come with an improved two-piece design that employs minimal moving parts for superior dependability. ARB Air Lockers are precisely tested and are made from the highest quality materials in order to guarantee best performance. Plus, the Air Lockers are easy to install and maintain ? you don't need any special skills or tools.