This package of two Binder Mechanisms in Black is part of the Create-An-Album Collection from 49 and Market. These binder mechanisms are to be used with any of the Create-An-Album Album Covers (sold separately). These binder mechanisms measure 4" long x 1.5" in width. The distance between the two rings is 2.75". To ensure the punch on your pages fits, it is recommended to use a punch hole that is 0.25" in diameter. To use these mechanisms, add the enclosed strip of adhesive to the flat base of the mechanism so that it does not cover the side that swivels. Secure the mechanism to the base of an album cover or other hard surface. Open the rings by gently pinching the two sides together.