LH. The 201727 & 201733 Drive Sleeve Kit from dormakaba (formerly known as Kaba) includes a fixed drive sleeve, a lever coil return spring and an inside retainer clip. This handed kit is designed to suit the dormakaba Simplex L1000 series of mechanical digital locks.. Suits dormakaba Simplex L1000 Series. Kit includes: Fixed drive sleeve, lever coil return spring and inside retainer clip. Handed.