Want low-volume practice without sacrificing sound? Meet the Black Hole, your new best friend. Designed to resolve the long-time struggle that drummers have faced - practicing on their drums without driving everyone around them crazy, while still maintaining the sound of their drums. This 22" Slide-In V2 Black Hole bass drum head fits snugly INSIDE your bass drum rim, with no bungees or tools required. Just simply snap in, tune to your desired tension, and you're ready to go!