Cymbal arm with grabber clamp that allows adding splash, crash or effects cymbals to the set uo without adding another tripod cymbal stand. Grabber clamp mounts directly to the tube of the existing cymbal stand, while its other end has a fine geared adjustment to position the 18-inch, 12.7mm boom rod. Brake style tilter has gearless adjustment for positioning – once it is positioned, use the drum key lock to lock in the position. Swing Nut auto cymbal tilter without wing nuts allows mounting the cymbals quick and easy. Diameter: 12,7 mm