Activate the Spring-Lock™ pedestals with the push of a button. Spring-Lock locking latch extends from the pedestal post and hooks onto the bottom of the base. Pedestals are machined to .002 tolerances and will not wobble. Seat mounts on Power Rise Stand-Up pedestals are die-cast aluminum and swivel a full 360°. Power Rise Stand-Up features height adjustment at the touch of a two-way lever. Spring-Lock Power Stand-Up has 23" - 29" height adjustment. 1.77" diameter.