SC RH No Cylinder LR1021B-26D. The weather resistant Simplex L1000 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 cost effective access control solution also features vandal resistant, solid metal pushbuttons for outstanding durability.. Handed unit left (LL) or right (LR). Protective clutch mechanism. Code change by authorised personnel. Fast code change whilst unit fitted to door