An apparatus is provided for use with at least one module comprising a base with, or for the receipt of, a power tool. The module base is received in a recess, aperture or slot defined in a frame. Engagement means are provided to allow the module to be releasably engaged in position, and guide means to allow the accurate introduction and removal of the module from the frame is provided. A plurality of support legs is also provided, movable between a first extended position holding a top surface of the frame at a first distance from a support surface on which the legs are located, and a second position in which at least a portion of the legs are folded or retracted such that the top surface is positioned with a gap at a reduced distance from the support surface.