Diamond Blue Alloy CAM Chains feature 5.5mm "D" shaped alloy cross chain links that are made from high grade manganese alloy steel. This shape has more gripping power than round rod chain. When combined with the diamond pattern, this feature makes Diamond Blue the best gripping and easiest to use truck link on the market. This makes them ideal for trucks that use their chains often and/or for extended periods of time. Side chain is powder coated blue. *CAM tool #QG20095 is included in each bag of chain. *Chain tensioners are NOT required. Fits tire sizes: 11.00-20, 11.50-20, 12-22.5, 12.5-22.5, 285/80-22.5, 285/80-24.5, 295/80-22.5, 305/75-24.5, 305/80-22.5, 315/80-22.5, 315/80-22.5 MICHELIN, and 320/75-24 . Go to peerlesschain.com Tire Chain Finder for more information. PLEASE NOTE: Chains should be fitted to tire before actual use. Fitment can be affected by age of tire, tire manufacturer and/or tread type. Please consult your owner's manual for any tire chain restrictions.