The HD4470 comb opener will open comb elements from ¼ inch to 2 inch. The HD4470 can open up to 21 element combs for documents up to 14 inches long. The HD4470 will mount on any vertical Rhin-O-Tuff OD or HD punch (optional mounting kit available).
Onyx HD4470 Comb Binding Machine - Comb Opening Module