This CRL Concealed Vertical Rod Exit Device is suitable for 1-3/4 inch (44.5 millimeter) standard thick doors. Featuring trigger action, positive release of hardened steel bolts for secure locking action. This device provides an economical means to satisfy both security and life safety requirements. The standard 42 inch (1067 millimeter) width will fit most doors. For narrower doors, cut the bar to fit. Baked acrylic coated satin aluminum or standard bronze hardware finishes are available. Doors requiring keyed entrance must use a =DL913">DL913 Mortise Cylinder Mounting Pad when using a standard mortise cylinder with "MS" type cam. =mortise cylinders">Mortise Cylinders are available with Schlage "C" or Yale "8" keyways, keyed alike or differently.