Crossbar v2 Kit consists of a NATO rail on top with safety pins on each end, 1/4-20 and 3/8-16 holes for attaching accessories, 1/4 inch pass through slots for attaching to cheeseplates and rod clamps, and ARRI standard rosettes on each end for attaching Rosette Arms and Rosette Grips. Includes NATO standard clamp for attaching to Safety Dovetails.