Bob's Machine's CNC machined, O-Ring sealed, Deckplugs offer great visual appeal and practicality to the deck of your boat! If you dont use your deck seats, no need to keep an open hole to let in dirt, debris, rain/snow, weights, baits, etc! Some of these holes even drain into compartments which in the case of Bassboats, are carpeted and can cause mildew! Seal the hole with Bob's Deckplugs!