The simple permanent binding system from DURABLE - effortless, quick and professional. Clear front cover, coloured PVC back cover. With fold-out filing strip (punched 70/80 mm) for storing DURABIND® in files and ring binders. Capacity: 1-30 A4 sheets Here’s how DURABIND works: 1. Insert the document and staple at the four marked points. 2. Remove the protective backing from the self-adhesive strip and fold the front cover over to the left so that the adhesive strip covers the stapled edge. Press firmly into place! 3. Fold the front cover back to the right along the scored line. Repeat steps 2 and 3 for the back cover.