CRL's Double Door Cam Lock is for double swinging doors, and has an overlapping lip that protrudes and serves to secure the second door (for maximum efficiency both doors should have a stop). Case, cylinder, and plate are zinc diecast. This Lock will fit 3/16" or 1/4" (5 to 6 mm) thick glass. For blank replacement keys cut on one side order Cat. No. BKEY; for blank replacement keys cut on two sides order Cat. No. B2KEY. Template included.