Garelick Millenium Series - Seat Slide System - Ribbed Series Features Low profile design allows 360 of rotation and 6 of smooth, wobble-free fore and aft travel Heavy duty anodized aluminum slide plate has standard 5x12 hole pattern to accommodate standard seat mounting holes Positive Lock Spider rotates 360, internal cup engages in 10 increments for positive stop lock Secondary twist control offers variable drag adj. and can be tightened to lock in place Internal Delrin cup provides smooth, g