I made mine (out of mahogany, thank you-- I hate teak) modeling them off of the original ('70s-era) Cherubini 44 ones-- scaled down to 10" centers and not 12". I like them because they have a little flat on all four sides (they are not round) and so feel hefty and are easy to fold your hand around. I have not installed them yet (still rebuilding the cabintop) but they have 4 coats of Captain's Varnish over the WEST epoxy and look like a million bucks (well they did come from a Cherubini 44- ha).
Be sure to bed them down with 5200. I know I sound like a mynah-bird with all my '5200' mantra, but handrails are one application that WILL NOT last long with silicone bedding. They just work too much, back and forth, for silicone to keep out the water. And then it goes into the core... and you have to rebuild the cabintop. (Guess what my boat's original rails were put down with.) The 5200 will make them structurally sound as well as watertight and you will add strength and security to the rail's installation... which is what you want here above all places.