Theft Resistant Locking Security Straps. Steelcore straps have a braided 7/19 galvanized steel cable at the center covered in a cut-resistant, heavyweight webbing made of a proprietary blend of steel and fibers. Our straps are also designed to minimize damage to any surface finish. The straps have an aircraft-grade aluminum buckle assembly that is powder-coated for corrosion resistance. Our locks are custom made using a double-butted key and pick a resistant design. Includes 2 keys and complete instructions.