Heavy-duty Ladder Clamps manufactured in the UK from zinc plated mild steel for long life. Designed to replace rope to lash your ladder to a car or van roof rack, not only does it do this well, but it also enables you to lock your ladder. No tools are needed to fit; hook the clamp around the roof bar and thread the bearer bar down to rest on the ladder. Lock in place with the padlock included with this kit. Easy to detach from the roof rack and easy to use with ladders and step ladders, the ladder clamps operate on most roof rack systems. Adds peace of mind to those who are not confident using rope!