Oregon 75-557 5/8-by-57-Inch Premium Aramid Fiber Cord Belt The aramid fiber cord provides high tensile strength for severe shock load and stretch resistance Pound for pound is stronger than steel as it is the same material used in bullet proof vests Fabric laminates in the base of the belt resist cracking, a major advantage in backside idler applications Our special clutching cover provides smooth engagement and prevents accidental engagement in clutching applications Measures 5/8-inch in width by 57-inches in length