The RLS5 is a cam loc snap shackle with a 20 inch (500 mm) strap that attaches to the Rhino heavy duty cross bar. This snap shackle allows a quick fitting and securing point for your laddersThe RLS5 is a cam loc snap shackle with a 20 inch (500 mm) strap that attaches to the Rhino heavy duty cross bar. This snap shackle allows a quick fitting and securing point for your ladders