Same as the original boom on my Columbia
You've got two steel
bails on the end. One is for the mainsheet and one is for the topping lift
. On mine, I don't have a real topping lift
, rather a cable that comes off the backstay with a hook. I don't know if this is original to the C26, but I actually like that better than a traditional line type topping lift.
The half circle with groove thingy is for your outhaul
. You should have a cleat farther forward on that side of the boom that the outhaul line cleats
to. This makes for a miserable outhaul, hard to get tight with the friction against that half circle thing and no mechanical advantage to light tightening and cleating. But it works ... sort of.