Using a parallel clamp to hold workpieces at a 90° angle can be difficult when it takes two hands to operate the clamp. To reduce the number of hands required for this process, I designed this parallel-clamp jaw pocket.

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Mounting easily to the underside of your workbench, the jaw pocket should fit a clamp's jaw without wiggle room. With one jaw of the clamp held in place, you can adjust the other with one hand and steady the assembly with the other. And the benchtop serves as a clamping caul—expanding the clamp's pressure over a wider area.
—Gary Scoggins, Hayward, Calif.