GrovTec US 0.5in Wood Screw and 0.75in Wood Screw w/Spacer Black. There are many accessories that can be added to your weapon; however it is important that you use the correct hardware to complement your firearm such as these GrovTec Swivel Studs. These GrovTec Swivel Studs are of the highest quality possible created using top quality materials and manufacturing for a product that will last. GrovTec Swivel Studs work with standard lumber and these swivel studs have the threading you need to ensure the best fit possible. Every good sling swivel stud provides a solid platform for your chosen sling or bipod to properly attach so you can have a more efficient weapon. If you're looking for a durable swivel stud to add to your weapon GrovTec has got you covered. These Swivel Studs will last years even if you have a lot of different weapon modifications. Enhance your shooting experience by using these GrovTec Swivel Studs. Specifications for GrovTec US 0.5in Wood Screw and 0.75in Wood Screw w/Spacer: Manufacturer: GrovTec US Color: Black Fabric/Material: Steel Package Contents: GrovTec US 0.5in Wood Screw and 0.75in Wood Screw w/Spacer GrovTec US GTHM50: 0.5in Wood Screw and 0.75in Wood Screw w/Spacer Black