Attwood Lock'N-Pin 3/4" Pin products offer outstanding ergonomical performance with a design that is proved by decades of experience. Power Pedestal for 3/4" Pin Seat Mount. Adjustable Height: 24" to 30". Post Diameter: 1.77". Non-threaded post with steel pin. Brushed aluminum finish. Lock'N-Pin products exceed ABYC Standard H31.6.1.