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 WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. Black Oxide Finish Made in the U.S.A. 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.