The supplied Laboratory Jack is used for Supporting and lifting of hotplates, glassware, baths, and other small lab equipment that requires a stable surface at a specific height. It is adjustable at the turn of a knob to a wide range of heights. It provides a rugged, height adjustable platform ideal for mounting optomechanical sub-assemblies that, as a functional group, require height adjustment. It fits into pre-tapped hole on the lab jacks. The Laboratory Jack is very efficient and useful.