Patented binding Clicks. Clicks are reusable, can be reopened and closed many times. Bound document lays flat, therefore easy to read and photocopy. Documents can be easily updated by removing or adding pages simply and effectively. Simple operation. For use with ClickBinder, ClickMaster or any other 34 ring wire binding machine. Zipper for opening and closing included in every pack. To fit A4 paper. 34 rings. Size: 16mm. Capacity: 145 sheets. Frost Black. Packed 50.