Each expandable Quick Release clamp on the AX-25L Dual Axis Two-Way Clamp fits 1/2" to 1-1/8" tubing, for reliable mounting and positioning in your set-up. The main shaft section adds an additional 7" of reach, to give distance in mounting larger cymbals and remote hi-hat controllers. Adjust from side-to-side and up-and-down for flexible mounting of accessories and added drums around the drum kit.