The RENZ WBS 340 is a modular wire binding closer, designed to attach to the front of the RENZ DTP340M. Alternatively it can be attached to a modular holding device (as shown in the picture) and used as a stand alone wire closer. Simple size selection and a no nonsense parallel closing bar allow for perfect wire closing on all wires from size 3 (3/16") to size 21 (1 1/4").