Millennium Series. Anodized aluminum. Provides full circle rotation for seating. Secondary twist control drag affords selected drag for rotation. Internal delrin bearing cup engages in 10 degree increments for positive lock when tightening. Dual quick lock handles - lever actuated, positive lock engages immediately. For use with any 2-7/8" diameter fluted stanchion pedestal seat base. Meets ABYC-H31, Type A seating standards.