Abstract: A movable storage unit is disclosed which comprises a storage unit housing with front casters and rear casters attached to the bottom of the housing by means of swivel attachments. Each front caster includes a locking brake with an actuation lever which extends forward through the lower portion of a skirt attached to the lower front of the housing. The skirt effectively screens the casters from view and holds each front caster in a position fixed toward the front of the unit relative to the caster's swivel axis. The skirt is recessed at the points through which the actuation levers extend, thereby improving the accessibility of the actuation levers and providing space to recess the actuation levers behind the front plane of the storage unit housing.