Ratio Parts saw chains meet the highest quality standards and are distinguished thanks to the latest manufacturing techniques using the best raw materials made from. Here is a sampling of the many features: ∙ Special punch mechanism about the rivet holes (hardly Material Wear) ∙ hardened rivet flange (significantly improved life) ∙ Extra High Chrome content (much longer service life and cutting strength), ∙ longer teeth roof (Excellent durability and stability). And much more.