Features: Attaches to seat post under seat Constructed of heavy duty, anodized aluminum Easy installation, fits all standard boat seat posts Swivels 360 degrees for maximum protection Simple locking mechanism locks umbrella in place Contains interior bearing, will not mar or damage post Easy, quick telescoping adjustment Can also be used as a net holder Fits Millennium Side Kick Double Fishing Seat (Side Kick and seats sold separately) Accommodates 5/8&Prime; to 1 3/8&Prime; shaft diameter&nbsp; 1 year warranty&nbsp; Umbrella and seats not included