Peter-
It kind of depends on how big your anchor is, as well as what type, as these factors determine how long the anchor roller has to be to keep the tip(s) of the anchor from impacting the bow of the boat at rest, and even on the way up.
I use a pivoting Simpson-Lawrence anchor roller with a Fortress FX-16 anchor, which is a Danforth like anchor, mostly because the pivoting feature is necessary for the anchor to self-launch while using a windlass, which I have.
Without more information on what size your Danforth is, it will be hard to suggest which anchor roller will work best for you.
If I were you, I'd take my existing anchor to a marine chandlery, and see how it fits on the various rollers they have, then, once I found one that I thought would work, I'd buy it with the proviso that I could return/exchange it if it didn't work once I held it up to the boat to check the fit.
If you have, or plan on having a windlass, then the pivoting bow roller is very desirable to have to work with a Danforth type anchor, as it drops the center of gravity down far enough to initiate the self- launching needed with a windlass.
Good Luck with your project!
Joe. :teeth :thup
Anchor set up on Sea Wolf:
