Frustrated by rubber pads that don’t stay securely on my pipe clamp jaws, I made these 3⁄4"-thick wooden pads that attach using rare-earth magnets. My first attempts were simply square pads, which worked okay, but tended to rotate and shift in use. I fixed that by attaching plywood strips that hug the sides of the clamp jaw as shown. For the most secure attachment, make sure the face of the embedded magnet is very flush to the surface of the block. I used steel mounting cups designed to attach the magnets, but you could just epoxy them into their recesses instead.
