The eye sling is perhaps the most versatile tether for rigging hardware. For this product a block is secured within the sling’s eye. A choking hitch (such as a cow hitch or timber hitch) can be tied using the other end. Although one must know knots to use an eye sling, there’s no arguing its efficient simplicity, especially with the block combo. Combination Tenex 3/4" x 12 feet sling with a CMI 2 ton Steel Block.