I have "The Rodent Dispatcher." It is a 1" x 2" about 12" long. I hold the rat up by the tail, and whack it with the corner of the board at the base of the skull. I've done it enough times that I can usually regulate whether I stun it, leave it twitchin', or kill it. Practice makes perfect, but then I don't exactly have a queasy stomach when it comes to whacking. I have found that I get better, less messy results when using "The Dispatcher" than when I was using the wall.