This Sliding Glass Showcase Lock is extremely convenient to open and re-secure. It is positioned approximately mid-way up on the showcase glass doors and does not obstruct the view of showcase contents. The bar width is 7/16 inch (11.1 millimeter), and it is notched for closed adjustment. The bypassing glass door overlap is 1-1/8 to 3-1/4 inches (28.6 to 82.6 millimeters). Each lock is supplied with two keys.