These Celco Slide Lock Fasteners will help tidy up your desk as you will have a place to leave your loose sheets. Simply add your documents, then lock down the fastener and ensure that your documents stay securely in place. These fasteners have a binding capacity of 40 mm, and there is an 80 mm distance between the rings. These fasteners have 80 mm distance between the rings. They are made from a sturdy, tin plate material. These fasteners are simple and easy to use, simply adding your documents and locking them down.