The FlexBeater in the 70 gram range is equipped with an aircraft aluminum rod and a dense felt beater and new shoulder, which packs a punch. It's time to get the most out of your bass drum. The new and improved shoulder is a new technology that enables the FlexBeater to behave like a felt beater and also will give you more punch when the music calls for it. The Dynamic FlexBeater is there when you need it whether pulling off doubles, triples and quadruples. It's all about being relaxed and feeling good. Feel the Flex!