The Any Chair Ripple Arm from KORUM turns chairs into a fully modular tackle station. Simply open the knuckle to fit your chair leg and use the included inserts for the best fit. You can adjust the angle with the handwheel system for the perfect setup. Supplied with inserts for 23mm round, 25mm round and 23mm square. Fits directly to Korum X25 and S23 Accessory chairs. RIPPLE ARM: The Any Chair Ripple Arm can be used as a butt rest or rod rest and features a threaded insert to add additional accessories. Fits directly to your seat to provide a stable, multi-purpose rod rest attachment.