Height adjustable brackets for worktop units that make it possible to adjust the height of the worktop unit stepwise. Brackets for height adjustable countertops are totally hidden and secured. It is important that the back cover has a min. 16 mm in void between to the right and left covering. Mobile base units can be a useful way of replacing storage space in a flexible way. Height adjustable worktop units is in increments of 4.2 cm.