Renz SRW wire binder is a durable and rugged 3:1 pitch wire binding machine. This machine features a modern design and fits in with any office, copy shop or print room. It has punching pins, all of which can be disengaged to enable odd size papers to be punched. An adjustable margin control allows you to precisely punch the paper every time. The Renz SRW will bind documents up to 120 sheets of 80gsm paper.