Fits canoes, regular kayaks, but not wide enough for sit-on top kayaks
these are a great deal for this two pack and the build quality of these holders is pretty good. even though the black part is plastic, it does not feel cheap or like it is going to break. the rotating lock on these is pretty easy to operate and you can attach the rod holder at two different angles. the negatives are that the one side of the clamp is not padded and the area of attachment could be a bit bigger.