strong horse

I know virtually nothing about bitting and horses. I have experienced a couple of occasions when jumping my new horse that he has a tendency to be quite strong when he's excited. Gets excited/strong at the sight of coloured poles/XC fences. I have 2 bits for him at the moment both of them...

hi everyone! i have currently got my gelding in a full cheek french link with a copper roller, but i still have no breaks, he's very strong and will pull away snatch his head back and run off even with me on him i cant hold him in this bit, he was previously in a bendy plastic french link type...