These look like what I have, but mine could possible be a different brand. Had them (4 for 2 kayaks) mounted on an outside wall for about 5 or 6 years. They rusted out and dropped both kayaks to the ground in a windstorm. They worked fine up until that point, tho it was sometimes difficult for me (not an especially strong person) to lift my kayaks up and over the J, which has a pretty tight curve.
