Category: 1-bolt US base
Chinook - 1-bolt US cup base
The Chinook one bolt rubber flex-joint base is the most comfortable base offering the best shock absorption. The base can be loosened for quick mast track adjustments even in the water. 1-bolt design offers a little more fore/aft adjustment in the mast track vs 2-bolt designs. US cup version fits US type mast extensions. Safety webbing, plastic deck washer and t-nut (on 1-bolt) standard features.