The FlexBurger is a BurgerBeater with a wood top and bottom sandwiching in a felt burger. This is no ordinary felt. German wool piano felt. Combine that with the FlexBeater patented technology and you have an amazing combination. Three hitting surfaces here. The clarity of hardwood, the warmth of felt and and amazing punch from the rubber shoulder! All at your beckon call. No need to switch beaters because its all there ready to go.