An apparatus for adjusting a height adjustable leg for supporting a cabinet, appliance or structure is described. The apparatus includes a coupling (10) comprising a driven member or feature (13). The coupling forms part of a height adjustable leg. The apparatus also includes a tool (50) comprising a driving member (51) and a torque input (52) for applying torque to the driving member. The tool and the coupling are complementarily adapted to releasably maintain engagement between the driving member and the driven member or feature to allow the driving member to drive the driven member or feature to rotate the coupling about a longitudinal axis of the leg for height adjustment of the leg. The driving member and the driven member are gears that releasably mesh together when the tool is engaged with the coupling.