Schlage Camelot Sectional Single Cylinder Keyed Entry Handleset with Plymouth Knob Finish:Polished Brass Top Extension Length: 15-3/4 inch

Top Extension Length: 15-3/4 inch (400mm)

but some doors have a bolt top and bottom

Schlage F62-ADD-MNH-RH Right Handed Double Cylinder Entrance Lock with Interior Manhattan Lever from the Addison Collection

provides protection against the unauthorized duplication of keys

Schlage Camelot Sectional Single Cylinder Keyed Entry Handleset with Plymouth Knob Finish:Polished Brass Top Extension Length: 15-3/4 inchModel: F60CAMPLY716, F60CAMPLY609, F60CAMPLY620, F60CAMPLY622, F60CAMPLY605, F60CAMPLY625. F60CAMPLY619 Keyed Entry (Single Cylinder) Function: This single cylinder handleset is keyed on the exterior with an associated locking mechanism on the inside that can quickly and easily lock or unlock the deadbolt latch. The exterior handle has a thumb plate that depresses to disengage the door latch and the interior handle features a lever or knob. Single