I improved inexpensive aluminium bar clamps from Harbor Freight using the Paul Sellers method to reduce twisting of the thin aluminium sides. The torsional strength of these clamps is now enhanced. I added pads to the jaws of the clamp to prevent it from marking the wood. These clamps now show a marked improvement in performance.

This is not an endorsement of Harbor Freight. I just found their prices to be more competitive than at other stores.

Here is where you can find more of me…
Instagram:   / sighthounds.  .
Website: http://www.sighthound-studio.com/
Facebook:   / sighthoundst.  .
Twitter:   / abhishek_m