Alesis 21" Cymbal Arm Mounting Hardware [Compatible w/DM4, DM5, DM6, DM7, DM8, DM10 and most other Alesis/Roland/Yamaha/Simmons/Ion Sets] Includes: 21in Cymbal Arm, Cymbal Mount Clamp, Felt Wingnut Fits most Alesis, Roland, Yamaha, Simmons, etc drumsets Tilter for optimal angle adjustability Installs easily using the Alesis mounting clamps *Clamp does not work with Alesis Nitro Kit rack*