Electronic Drum Rack Clamp with L-Rod for Mounting Pads on 1-1/2" diameter rack bars. Black plastic clamp with metal L-rod. Clamp adjustable with standard drum key (not included), and L-Rod is adjusted with thumb knob (see pictures). Fits most standard-sized (1.5" diameter) electronic drum racks, such as Yamaha and Roland - please measure your rack bars to ensure fit.