The Rhino SafeClamp is a step up from traditional screw down ladder clamps. Made from stainless steel and composite materials to ensure strength, corrosion resistance and a long lifespan. The patented locking arm mechanism means that the SafeClamp can be secured into place five times quicker than a screw down ladder clamp. An integrated locking mechanism is included so no padlocks are required. Maximum internal hook measurement of 65mm from the front to back of the roof bar. Compatible with all Rhino Roof Racks & Bars.