The Keeper Engineered 45 in EPDM rubber compound takes rubber straps to the next level of strength and durability. Unlike most competitors straps constructed from inferior rubber, these straps will not crack, rot or lose rebound qualities with repeated use. It features quality rubber that remains non-brittle in temperatures as low as -40 deg F, high-temperature or demanding elements to be used year round. The zinc-plated, steel hooks resist corrosion and will not bend, break or rust as easily making Keeper EPDM rubber straps the excellent choice when it comes to securing valuables.