RE: Rocket Aeroheads Ultimate Steel
Cutting diameter is 7/8". they are a super accurate fixed blade head, but I had problems with blades breaking and falling out on the tire and steel drum tests. As they are right now I really can't recomend them to anyone. That said rocket does make some excellent broadheads that do preform well.
TAKE YOUR KIDS HUNTING AND YOU WON'T BE HUNTING FOR YOUR KIDS