Tarp Straps are used to Affix the Tarp to the Trailer; Tarp Straps are NOT legal as Load Securement and Drivers Can be Ticketed for Any Use of a Tarp Strap as a Primary Tie Down. QTY 20 100% Natural Rubber S-Hooks Crimped on 21" & 31" to Prevent Tarp Damage Excellent 'Memory' - Strap Rebounds to Original Length Elongation Tested to 5x the Original Length Optimized for Cold Weather Use 25+ Year, Market Proven Product by Jafferjee Bros. of Sri Lanka Meets ASTM D1418 - 10a