Rim-Clamp Mechanism: The right side features a heavy-duty, spring-tensioned jaw structure with an adjustable grooved knob to tightly grip standard metal drum hoops.Microphone Clip Holder: The left side incorporates a built-in cylindrical clip or integrated receptacle to hold standard dynamic instrument microphones (such as a Shure SM57 or equivalent drum mic).Position Adjustability: Equipped with individual tightening screws to let you slide, tilt, or alter the height/angle of the microphone for optimal proximity effect and sound isolation.