The Union unites the two best materials in the game, Scandium and Titanium. With DYNAMIC WALL TAPER technology, the UNION truly has the optimal strength-to-weight combination. Shape: Traditional Material: Scandium-Titanium Alloy Grip: Bead Blasted Finish Dynamic Wall Taper: An extrusion process tapers the wall thickness of the shaft. This process puts added material in areas of the shaft that see the most abuse and cuts weight in areas that can afford it. Adjustable Butt End (ABE 3): Our Signature butt-end now with smooth, rounded edges, 7 points of contact and a silicone liner that locks tight into all shaft shapes.