KEEPER® engineered an EPDM rubber compound to take rubber straps to the next level of strength and durability. Unlike straps manufactured from cheap, inferior rubber, these straps won’t crack, rot, or lose rebound qualities with repeated use. This rubber will remain non-brittle in temperatures as low as -40°F and in most demanding elements. Tough zinc plated, steel hooks resist corrosion and doesn't bend, break, or rust as easily as other straps, making KEEPER® EPDM Rubber Straps the best choice whenever and wherever you need a reliable strap. All rubber strap is measure from hook to hook.