The HD8370 Insert-A-Bind wire inserter/closer is a semi-automatic machine that both inserts and closes double-loop wire binding spines in one easy step. This efficient, user-friendly unit is easily adjustable for varying sizes of binding wire from 1/4" to 9/16" diameter. Unlike some electric wire closers, the HD8370 wire inster/closer is efficient, inserting and closing the wire in one easy motion, eliminating the manual hand insertion of documents onto the wire loops prior to closing. This sturdy unit is suitable for binding documents and books from 5-1/2" to 14" wide and is easy to operate with any wire size. The HD8370 is designed to operate as a stand-alone unit or in conjunction with any vertical HD Rhin-o-Tuff punch by means of an optional mounting kit. With its durable, all metal construction, the HD8370 is a reliable, lightweight and portable solution for all your medium-volume binding requirements.