This clamp can be attached to an existing stand pipe that is 15.9mm to 28.9mm in diameter. By attaching a L-Rod or cymbal boom arm that is 9mm to 12mm in diameter, you can easily add a cowbell, woodblock, or cymbal to your drum kit. Do you ever feel like you need three hands to attach a drum clamp? Are you constantly frustrated by having to search the floor for dropped and scattered parts? That's why TAMA's hardware designers came up with the FastClamp. If your kit requires a lot of clamps, set up will be a lot faster and easier with attachments that feature the FastClamp Easy Set-Up System.