Happu-store(TM) 2 Pcs Sling Swivel Studs This is a set of Swivel Bases. These Studs will mount on just about any rifle and will accept most brands of sling Swivels Studs can be used on both Wood and Synthetic Stocks. Easy way to add a sling to your rifle. Fits all swivels and bipods Comes with 2 Screw bases and 2 White Spacers. Thread Length: 20mm Swivel Wood Screw Studs, Short for the fore stock, Long for the butt, Give your gun that all needed sling or bipod by using these wood screws Package Included: 2 pcs Sling Swivel Screw