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 0.75" thick Can be reversed to accommodate any thickness v-bar 0.25" Through hole on extender makes tightening easy Laser indicator lines enhance repeatability when placing v-bar Available in these lengths: 3", 4", 5" Includes self-retaining washer 5/16"-24 threads on both ends All stainless-steel hardware Product Weight: 3" - 2.38 oz, 4" - 2.88 oz, 5" - 3.38 oz Made in the USA