The smallest tool in your bag that packs serious rating! ZEUS 5/16" x 6" Shackles are designed to replace steel shackles using SPECTRA fibers which are the strongest on the planet! This synthetic shackle rated at 23,400 lbs never corrodes, stronger than steel, and are safer than steel in the event of a mishap. ZEUS SHACKLES have a protective sleeve over the SPECTRA giving it extra wear, abrasion resistance. SPECTRA fiber is chemical resistant, UV resistant, water resistant. SPECTRA is pound for pound 15X stronger than steel. Best of all you can throw it in your glove box for that 1 emergency situation!