GearNuts has the essentials for the well-equipped musician! The APC-33 is an all-purpose, dependable clamp that lets you mount your eletronic percussion (like a SPD-20 or an SPD-11) to your acoustic kit. It features a thick-walled, 4 x 5 inch metal mounting plate with totally adjustable arm. Big, spring-loaded wing nuts for really simple tightening with the hands.