GrovTec GTHM47, Swivel Studs, Black Oxide Finish, Black, Includes (1) 7/8 Machine Screw Stud and Nut, (1) 3/4 Wood Screw Stud, (2) Spacers GTHM47 GroveTec's Swivel Stud set includes all the necessary hardware in order to install swivel studs onto your favorite tradition rifle stock. The set includes a 7/8" machine stud with nut" a 3/4" wood screw stud and 2 washers for a perfect fit and finish. Buy with confidence when choosing GrovTec.