4 "x 4" aluminium router lift table woodworking graven lab lifting stand rack

100% new and characteristics: structure: experimental lift through the panel, under the floor and the rotating axle, handwheel and other components. objective: lift to adjust the height of the object support device for physical, chemical, biological experiments, lift the object or instrument. how to use: lift place a smooth, rotating hand wheel to allow lift on the front panel to be adjusted to the desired height. maintenance: after use, must be kept clean and stored in a co