The Ring Control features foam donuts for partial muffling. Specials plastic trays told them in place and easily mount under the head and on top of the bearing edge. Triple notched system secures pads without adhesives even on bass drums with low tension. The Remo Muff’l Control Ring features foam rings mounted in drums with specially designed trays that hold them in place to provide partial dampening for Tom Snare and Bass drums. Control Rings are easily mounted under the head on top of the bearing edge. A triple notched system secures pads without adhesives even on bass drums with low tension.