With their thick square-section threaded screws, crank-handle bar clamps generate enough clamping pressure for the most difficult clamping situations, like straightening bowed boards during glue-up or pressing too-tight joints closed. Most of these bar clamps feature either steel or aluminum bars. Steel-beamed bar clamps, such as the Jorgensen 7200 series, are the strongest, but they’re very heavy — and expensive. For everyday duties, aluminum bar clamps like the Rockler Sure-Foot™ clamps are less expensive and easier to handle. For thicker stock or wider assemblies, choose clamps with deeper jaws. Clamp kits, such as Veritas panel clamps or Wood River’s clamping system, are a cost-effective alternative to ready-made bar clamps; you make the wood bars yourself.