The bar clamp, which comes in pipe, parallel jaw, aluminum bar, and steel bar versions, is used in almost every facet of cabinetmaking, and the right clamp can make the difference between success and failure. So I tested the 48-in. size of a representative sample of clamps to measure the deflection in both the bar and the jaws when applying various levels of force. I also used a set of four of each type of clamp to assemble a simple MDF carcase (joined with biscuits) and a large poplar panel, looking at ease of use and the resulting flatness and squareness of the finished product.

At 3 lb., the Universal is the lightest of any of the aluminum bar clamps I looked at. The screw handle is a compact wing shape yet offers a solid and comfortable grip. Another nice feature on the Universal is that the notches for locking the tail jaw are spaced only 5/8 in. apart, the closest of any model, meaning less adjustment of the screw mechanism.

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