An easy and flexible solution for adding an additional cymbal to your kit. It is a height-adjustable boom cymbal arm that connects to either a tom arm, or another boom arm (up to 12.7mm rod).Height-adjustable (7" 8") Knurled boom arm is 12"L x 12.7mm Quality-built Easy to setup Flexible adjustments Clamps fits up to 12.7mm rod Ratchet tilter