The Mullen Bender is used to form the standard 12" flat-bottom loop. The durable tool is molded of a resilient plastic. A universal “V-groove" hand forming tool is recommended for 412, 500, 500MC2, 540 and 565 cable diameters only. The Mullen Bender is available for use with a single cable and two cables as indicated. In cold weather, the tool may break when dropped.