Great for use with the Shrewd Revel series rods. CNC Machined, 6061 Aluminum body. Features an adjustable collar for security and ease of use. Collar shelf is compatible with Shrewd Riot v-bar. Works with any other v-bar that is 0.75in thick. Can be reversed to accommodate any thickness v-bar. 0.25in through hole on extender makes tightening easy. Laser indicator lines enhance repeatability when placing v-bar. Available in 3in, 4in, 5in lengths. Includes self-retaining washer. 5/16in-24 threads on both ends. All stainless-steel hardware. Product Weight 3in - 2.38 oz, 4in - 2.88 oz, 5in - 3.38 oz. Made in the USA....