nternal kick drum boundary microphones have always come with a challenge to keep them reliably in place inside the kick drum. Well, not anymore thanks to the Patented Kelly SHU FLATZ™ System. For convenience and sonic consistency from gig to gig, there has never been a microphone holder product on the market meant to support, stabilize and isolate these popular kick drum microphones until The Patented Kelly SHU FLATZ™ became available. Designed for use with 4 models of the most popular condenser boundary microphones commonly used for internal kick drum miking. No drilling is required for installation.