Immediately absorbs shocks during rough sea conditions. This option has 7 lock-in positions and a height range of 14 to 19 inches. Additionally, stainless metal screws will work flawlessly to mount this. Nuts and bolts are not required! The powder-coated steel base will protect against corrosion and fading, perfect for long-term use. Besides, the pedestal features a built-in shock absorber that lessens fatigue during rough seas. This is an excellent choice if you’re looking for a reliable and durable seat pedestal. Technical Features: 1. 9" OD w/ 2-7/8" holes 2. Anodized Aluminum 3. 13" x 7" Platform 4. 360° rotation with locking knob PROS🟢 Smooth fore Aft travel slide Easy installation CONS🔴 The lowest position setting is non-swivel.