The SC-GCRMC is a standard chrome multi clamp that will allow you to add a cymbal arm, tom arm, or percussion accessory arm to a rack. This hinged clamp is rock solid and will lock the accessory down safely to the rack. It will work with any Gibraltar rack bar, or any 1-1/2 inch diameter non-Gibraltar branded bar, and will accept accessory tubes with a diameter of 1/2 inch to 1-1/4 inch. This is the “go to” clamp when needing to add an accessory to a rack.