The Gear Sector™ Rail Mount Offset QD Swivel is constructed using multiple base materials and is precision CNC machined from billet stock. Material and finish processes are outlined below: Base Material: 6061-T6 Aluminum Base Finish: Military Specification ( MIL-A-8625F ) Type III, Class II Hard Coat Index Material: 1144 StressProof® heat treated steel Index Finish: Nitrocarburising by Nitrotec® Weight: 1.60 ozs. Compliance: 100% Berry Amendment Compliant Origin: Proudly Made in the USA Package Contents The Gear Sector™ Rail Mount Offset QD Swivel comes complete with the following components: 1ea. Gear Sector™ Rail Mount Offset QD Swivel 1ea. 9/64th hex key for securing mount to rail system 1ea. Vibra-Tite® VC3™ thread locking compound.