I have them for my Scotty's. I like them.

One downside is that each lock has its own key so you have to keep track of them. I wish that each set could be keyed the same.

If someone wants to take your Scotty's, they'll probably figure out a way if they have time. The locks might slow them down or make them decide to try somewhere else.

The rubber caps do come off. Make sure you keep them clean/oiled if you leave the DRs on the boat through the season(s).