But you also need the one breaking TO BE ACCURATE! I've seen one man get a broken finger holding a board and getting kicked in the finger. I've seen several, including myself, get bruises when the kicker missed the middle of the board (heck, some missed the boards on jumpkicks and kicked ME!
Deaf
Yeah, I took all the skin off my instructor's knuckles the first time I tried to break with a kick. Embarrassing.