Product details:

The KingPin Pedestal System is designed for secure placement and simple removal. The unique KingPin System has a 3/4" E-coated steel pin that extends from the bottom of the pedestal. The standard pin with a high-strength composite clip is designed to prevent unintentional detachment.The KingPin Power-Rise Adjustable Pedestal - Adjust the height of this pedestal for use with a seat or a leaning post. Rotates 360. Satin finish. Adjusts from 16" to 22.75" high.