This is a really clean, hard to find clamp that was used sparingly! This Assembla E features 1 horizontal and 1 vertical interlocking pressure beam, each with electric push button controls. The beam surface area eliminates the need for pressure pads. 12″ minimum and 100″ maximum length, 31″ max. depth, 10″ minimum and 52″ maximum height. (52-3/8″ X 100-1/8″ max. daylight) Vertical and horizontal interlocking pressure walls move parallel and square the clamp frame. Manual switch setting with LED readout, adjustable pressure regulator clutch system stops the beams at preset pressure resistance. This fully functional machine has been fully cleaned, checked, and is ready to work from the time you receive it. This is our guarantee to both you and your company!