PDP Concept Series Cymbal Boom Arm - Long Concept Long Cymbal Boom Arm At the center of the Concept Series line of hardware is an innovative toothless QuickGrip clamp that allows drummers to add mountable percussion instruments, cymbals, accessories, and even microphones, without the need for additional stands It also gives players the ability to customize just about any existing stand in a myriad of ways The sturdy, all-metal-constructed clamp is outfitted with a friction disc that offers infinite adjustment, while the versatile design means that the  factory set clamp can be quickly and easily converted to 10 5mm by flipping over the drum key brake on either end