Basically what I am looking to do is have an item that can't break wood(logs, planks, fences, doors, stairs, etc.). I'm adding a sonic screwdriver instead of a wrench for use on the machines in my mod and want to keep with the whole idea from Doctor Who that it doesn't work on wood. I would prefer to have it where it won't even attempt to break the wood block if the player hits the wood with it but if that is not possible at least have it where the wood won't drop the block if the sonic is in hand when you break it. Would it be easier to make it where no blocks can be broken with the tool in hand, but it still work like a wrench would on machines?

I would be more amused if you returned Float.MIN_VALUE (the smallest, positive value representable) instead of 0.