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 100 PACK 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