The adapter bolt swivel base and spacers are designed for an exact fit on 742 ADL and Standard models, ensuring seamless integration. Please note that this product does not fit BDL models. The package includes an adapter bolt, a 3/4 inches rear wood screw swivel stud, spacers and one pair of GT locking swivels featuring a black-oxide finish. This setup provides a reliable and durable solution for securely attaching your sling, enhancing your firearm's functionality.