The Bully clamp-on tie down is the world's most versatile tie down for pickup trucks. This single tie down clamps under your truck's bed rails with its unique patent pending cam-locking design. To hold the clamp in place, simply tighten a bolt. This draws the cam-lock down, which creates a powerful vice-like grasping action. And there's no need to worry about scratching up your truck's paint job thanks to its 3/8" neoprene rubber pad. Altogether, Bully clamp on truck bed tie down clamp will allow you to easily secure your cargo with minimal effort and exceptional flexibility.