of the shaft 20 is preferably selected so that at predetermined rotational positions of the wheels 24 and 26 the rollers 78 of two of the three carriages 38 40 and 42 are engaged with the base members 10 and 12 as shown in fig3 this arrangement permits empty containers to be removed from or new containers loaded onto one of the carriages for example carriage 40 while a worker or operator continues to use the parts or other articles contained in the other container on carriage 38 fig3 in the preferred embodiment two containers can be loaded onto each of the carriages giving the operator or worker a choice of at least six different sets of parts if so desired however the carriages may carry only a single container or more than two because the carriage opposite the one currently being used by the worker is at the floor or ground level the container may be removed or replaced by a conventional fork lift truck returning to fig8 and 9 the container platforms 50 may include one or more turn tables such as turn tables 84 and 86 on which the containers may be placed the turn tables 84 and 86 are mounted on a horizontal ball race 88 having a plurality of balls 90 confined in a ball cage the balls rotatably support the turn table 84 or 86 on the base 50 the turn tables 84.