This swivel set comes with two Allen Magnum swivels that fit Ruger rifles with barrel bands, like the 10/22, Mini-Thirty, Mini-14 and more without hardware already installed. Designed to fit slings up to 1 in wide, this set contains the necessary hardware to easy install swivels, with an included butt stock threaded stud (for wood or synthetic stocks) and a specially designed forend stud that mates to the barrel band.