SC No Cylinder 1021B-26D. 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 to allow code-free entry as well as vandal resistant, solid metal pushbuttons for outstanding durability.. Single access code. Factory handed left - field reversible. Lock can be easily programmed using the keypad (no need to remove the lock from the door). Knob operated