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.

This clamp uses a heavy I-beam with a sliding tail assembly that engages with a multiple-disk clutch mechanism, rather than positive stops like many competing brands. The tail slid easily on the bar and provided a very positive grip. The T-handle and screw are stout, but there is very little clearance when turning the handle over a workbench.

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