10 in. Pruning RazorTooth Saw blade goes through four manufacturing processes for maximum durability and hardness, friction reduction and making extremely fast and efficient cutting. The saw blade has triple-ground impulse-hardened teeth for two times more material removed per stroke. The SK5 blade cdontains more carbon, which means harder steel, allowing the blade to stay sharper longer. The chrome-plated blade reduces friction and improves efficiecy. It comes with a limited lifetime warranty. Replacement parts are also available.