The Magliner Slider retractable underbody truck ramps make loading and unloading safe and easy. Featuring a Twin-Tooth surface for excellent traction in either direction, the Slider ramps are available in three widths to fit downsized, standard, and trailer/wide truck chassis. Each ramp is conveniently shipped completely assembled for quick installation. Once installed, simply roll out the ramp and securely store it underneath the truck. These ramps also feature hook-end attachment points to prevent kick-out during use, as well as anti-rattle springs to prevent rattling and bouncing when driving. Safety locks ensure the ramp stays securely in place when stored, while the anti-theft angle stop prevents the ramp from being extended too far and reduces the risk of theft.