Combined with the 241L Locking Side Deck Mount, the 340L is the optimal way to mount all Scotty post mount rod holders & accessories to your 3" gunnel track. Stainless steel fasteners included. Easy grip T-knob for loosening or tightening Deck post mount Corrosion-resistant stainless steel hardware Push button release to unlock Side post mount Additional corresponding products: 166 1.5" Ball System Base 176 2.25" Ball System Base