A pair of 1 inch quick-detach sling swivels: one with a machine-screw and nut base, usually used at the front where it bolts through the fore-end (common on stocks with a barrel band or thin fore-end), and one long wood-screw base for the butt stock. Quick-detach (QD) sling swivels let you clip a rifle sling on and off in seconds: press the button or lever on the swivel, drop it into the stud and it locks in place. They suit 1 inch wide slings. Being a pair, you get one swivel for the front and one for the rear of the rifle. Check that the screw type and length suit your stock before fitting; a gunsmith can fit them if you are unsure. Sold without a sling.