Individuals apexes are uniformly put but asymmetrical in condition, with just one steep edge that the spring-loaded pawl grabs. Though tightening the ratchet, the threaded strap rolls round the axle. This movement shortens and tightens the strap over the load. Very simple and brilliant, you’ll feed the straight loop https://carcarriersupplies.com/product-category/roll-back-straps/