GrovTec US 12 Pack 0.125in Machine Screws Black. GrovTec US machined these Gun Accessories from steel and finished them with an oxide-finish for enhanced durability and resistance to corrosive elements and abrasion. This GrovTec US 12 Pack Machine Screw Swivel Studs is incredibly versatile and you can use it with any AR AK or a classic handgun. If you're looking to enhance your current setup use these GrovTec US Sling Swivel Studs to gain a stable shooting platform for your accessory. Specifications for GrovTec US 12 Pack 0.125in Machine Screws: Manufacturer: GrovTec US Color: Black Fabric/Material: Steel Finish: Oxide Package Contents: GrovTec US 12 Pack 0.125in Machine Screws GrovTec US GTHM280: 12 Pack 0.125in Machine Screws Black