Kessler Grip BlokKessler Grip Blok was born as a small request from Ascending Works for a way to create a speed rail starter from a Mitchell mount attached to their Ray Rig. It grew from a single use adapter to a broader, multi use design. The evolved design of the Kessler Grip Blok solves many common problems encountered while rigging with speed rail. Designed to work with the Kessler Mitchell Boss, you can create horizontal or vertical speed rail starting from a Ray