Is it ok to charge ex tenants for broken deadbolt?

[Tom R.]

I had some tenants move out recently and the deadbolt on the front door is messed up. I replace the lock every time a tenant moves but I always save the locks to use later. The deadbolt looks fine but its very difficult to get the key in all the way and back out. Should I charge the cost of the deadbolt to the tenants deposit? Its part of a 2 door set with knob and deadbolt. Should I charge for the cost of the set or just the value of the deadbolt?