Ring binder mechanisms (or ringbook mechanisms) are used in loose leaf files, folders, portfolios and a wide array of other filing products. They are easy to open by hand or a booster. 

Trigger Ring Mechanisms. Our handy allrounders. Rings are opened and closed with the push of a trigger.

Ring binder mechanisms are available in a variety of shapes, including a round ring binder mechanisms , D ring binder mechanisms , Q ring binder mechanisms and Slant D ring binder mechanisms .