Easily attached and removed from a 2-7/8" OD pedestal, this item slides over an existing chair pedestal allowing the boater to change from a seat to a leaning post as preferred. The base plate underneath provides adjustments fore and aft for use on all size boats. Features two rod holders. Storage compartment: 12" wide x 4-1/2" high. Leaning post not included. Meets the highest standards of the ABYC.