This loop swivel set features locking swivels that create a secure, tight loop under pressure, ensuring your sling stays in place during use. Simply mark the location of your existing swivel stud or drill a 1 inches hole in the buttstock and you can easily mount these looped swivels yourself. The added security of knowing the swivels won't release under stress is invaluable, ensuring reliable firearm handling. Constructed from chromium steel and finished with a black oxide coating, these swivels not only enhance the look of your firearm but also offer protection against rust and corrosion. Installation is tool-free and the included screws can be secured with a socket head cap or bolt for added stability. Designed for versatile use, these swivels are suitable for all shotguns, even if not listed in the package details.