MEDIUM. Replace a corroded or lost snap button in the center connector of a two-piece paddle. Made of stainless steel. Common size for many brands. Fits some Aquabound, Carlisle and Heritage branded paddles. Will fit a 5/16 inch diameter hole, shaft diameter ½ to 1 inch. Known to fit most Carlisle Magic Plus and Voodoo paddles, as well as modern Bending Branches aluminum shaft paddles. A useful part to have in your field repair kit.