KA. The L2000 Key Override Adaptor from Lockey is designed to convert Lockey 2000 Series digital locks into having a key override facility. It couldn't be easier to install as it simply fits behind the digital lock, it has reversible handing and is compatible with both internal and external door and gate applications. This unit has an aluminium construction and it is supplied with 3 keys. Designed to suit the following Lockey Digital Locks: 2210, 2430, 2435, 2430DS (double sided) and lever handle versions 2835 & 2835DS (double sided).. Adapts Lockey 2000 series digital locks to have a key override mechanism. Digital lock not supplied. Supplied with 3 keys. No additional installation required - simply fit directly behind the Lockey Digital key pad