Very good, sturdy clamps. I only rated them 4 stars because Rocklers surefoot is a much better design with equal the quality. Use galvanized pipe, same price & it won't rust or stain your work. Also for some homebrewed clamp pads take some scrap 3/4" fir plywood, it's relatively soft & doesn't split, cut it into roughly 2" x 3 1/2" pieces. Then drill a 1 1/8" hole towards one end & paint it with polyuerathane. Slip it over the pipe & screw it to the clamp faces from behind with #6 x 3/4" sheet metal screws. You'll wind up with decent clamp pads that won't stick to glue or come off of the clamp.