Four clamping cylinders that can be adjusted Uses less floor space than a flat table Prevents back pain by allowing worker to stand upright during use Retractable squaring fence Customized setup Powerful ClampingFour high-quality clamping cylinders apply tremendous pressure on the joint line to maintain a flush assembly. Clamping arm rolls easily on bearings and each cylinder glides smoothly for perfect positioing.Fast Frame AssemblyFast face-frame assembly is great, but fast and accurate assembly that eliminates sanding is even better. Four clamping cylinders can be precisely adjusted to apply greater pressure to the joint line on almost any size frame.Retractable FenceThe aluminum square fencing ont he left side of the trable retracts out of the way to accomodate frames larger than 8 feet. Just start your frame with the squaring fence up, then adjust and retract the fence as needed.Customized SetupEach clamping cylinder can be independently controlled so your can actuate each cylinder individually, or you can activate them all at once with the master switch on the bottom of the clamping arm.