Elegant Deadbolt Lock: Adds security to your storm or screen door; ideal for use on exterior doors where a deadbolt and keyed entry security is needed Door Compatibility: The deadbolt lock has the same style as the DX Series of lever handles; a keyed lock cylinder is included for operation from the outside Easy to Install: This keyed deadbolt lock is simple to install; requires three 5/16" holes to be drilled through the door for the screws and spindle; easy-to-use installation template and videos are provided Compatible Design: The deadbolt for doors is made of die-cast zinc and painted or coated to match the color of the handles; the casting process makes the deadbolt finish resistant to chipping and discoloration Versatile Installation: The deadbolt lock can be installed above or below the handle on any out-swinging storm door; ensure that the inside deadbolt does not interfere with door hardware