[High quality]：These spider bungees are made from a combination of elastomeric and natural rubber products to increase elasticity and durability, and come with metal hooks crimped onto the arm ends. [Durable]：They work with both cable and link tire chains, and can increase the chains life by up to 25%. [Working principle]：Spider bungees work by pulling the slack evenly out of the chain toward the center hub of the bungee. [Size]：Fits Rim Sizes: 18"-25" (460mm-540mm) Part 0218 has an overall diameter of 20" and works best with rim diameters ranging from 18"-25" and with metric rim diameters ranging from 460mm-540mm. [Best choice]：Truck Snow Tire Heavy Duty Truck Tire Chain Adjuster Tensioner are an excellent choice for adjusting tire chains.