A drawer with side walls provided with longitudinal tracks for engagement with drawer runners during use and a rear wall having a longitudinal track in which a pair of guide members are slidably located for movement between operative positions in which they extend across the rear ends of the tracks in the side walls and engage with the drawer runners and retracted positions in which they are arranged to retract clear of the rear ends of the runner tracks, there being rotary actuating means accessible from within the drawer to effect movement of said guide members between said positions, the actuating means incorporating locking means to retain the guide members against movement in their extended and retracted positions.