There is another post here about spanking, i suggest you check it out

NO!! A paddle is TOTALLY uncalled for. Your hand is the only thing you should use to spank a child with. How old are your girls? I think you need to reasses you discipline methods (not being rude, just honest). If you have to hit your girls that hard then its abuse. I suggest parenting classes specilizing in disipline. This does not mean you are a bad parent, but if you don't seek help you will be one. I know this sounds aweful but think about you kids and what you are teaching them. GET ASSISTANCE, GET HELP, WHAT YOU ARE DOING IS WRONG!