The Pearl Bass Drum Hoop Mount Closed Hi-Hat Holder transforms the top of your bass drum into a totally fresh playing surface. Its finish-saving hoop clamp attaches a pair of closed hi-hats directly to the top edge of any bass drum. Cymbal spread is spring-adjustable and can be controlled with a quick turn of the top cymbal nut. Excellent for added hi-hat accents and multi-layered cymbal stacks. Transforms the top of your bass drum into a totally fresh playing surface.