Abstract: A screw top closure is provided with a freely rotating ring surrounding its periphery thus preventing the user from rotating the closure by gripping the periphery. The ring is captivated on the closure and cannot easily be removed. The closure is provided with a key way on its upper surface which the user can engage with a key which is accessible only to authorized users.

Abstract: A foldable machinist's tool tray is provided which conveniently supports a pan over the engine compartment of an automobile for example. When in its unfolded position the tray may be wheeled about on its wheels but is prevented from inadvertent movement by a leg which engages the floor. In its folded position the tray is still supported parallel to the floor on its wheels but at a much lower height so that it may be wheeled underneath the automobile.

Abstract: A foldable machinist's tool tray is provided which conveniently supports a pan over the engine compartment of an automobile, for example. When in its unfolded position the tray may be wheeled about on its wheels but is prevented from inadvertent movement by a leg which engages the floor. In its folded position the tray is still supported parallel to the floor on its wheels but at a much lower height so that it may be wheeled underneath the automobile.