Ultimate Arms Gear Two QD 1" Inch Slot Loop Wood Screws Studs Type Swivels with Spacers for AR15, AR-15, M4, M-4, M16, M-16 .223 5.56 556 .308 Set of 2 Steel Swivels 1" Wide + Wood Screw Studs 1/2-Inch and 3/4-Inch Screws Designed for Straps or Claws 1" Wide or Less. All Steel Construction, Black Finish. Super Heavy-Duty Swivels, Will Hold Up To Years Of Heavy Outdoor Use. Quick and Easy Installation. Fits Wood and Most Synthetic Stocks & Forends. 2 White Spacers Included to Insure a Secure Tight Fit and Not Scratch The Rifle / Shotgun.