No trebles here. I never did care for them because the hooks are small and if you only get one bite you don't have much to hold on too. The other problem with carp is their habit of sucking a bait in and then blowing it out. many think this sucking on the bait, I bought into it at one time, but videos show it is as I said, in and out of the mouth. Enter the Brits and their hair Rig. This thing will catch more carp than all other rigs combined. The secret is in the bare, sharp hook that turns and snags virtually every time. This works, believe me.
Here is one of many tutorials on the net.
http://www.gofishing.co.uk/Angling-Times/Section/how-to/Coarse-fishing-advice/Fishing-Knots/Knotless-knot-hair-rig/
After you put your dough ball on the hair stick a small twig or toothpick through the loop and keep it from sliding off. I always used braid for the rig. It seems everyone has some left over and this works well with it. This is a leader, so what you don't see is a loop on the other end. The rig also requires a sliding sinker to work well. The idea is that when the hook pricks the carp they will bolt and when they hit the sinker the hook will set.