PB No Cylinder 1041B-03. The weather resistant Simplex 1000 series from dormakaba (formerly known as Kaba) is a fully mechanical digital lock solution, eliminating the hassle of frequent battery replacement. The lock can be easily programmed via the 5 pushbutton keypad and does not require the lock to be removed from the door. This knob operated digital lock supports a single access code and can be easily reversed on site to suit both left and right handed doors. This cost effective access control solution also features a key override and vandal resistant, solid metal pushbuttons for outstanding durability. The additional thumb-turn activated free passage mode is particularly useful for situations where you need to enter the building several times in quick succession, such as unloading a car or van.. Single access code. Vandal resistant solid metal pushbuttons. Lock can be easily programmed using the keypad (no need to remove the lock from the door). Heavy-duty, weather resistant lock housing