Start of lstUrls_of_images_in_html_descriptionProduct Number: 15912 This kit will allow you to mount a sling on your favorite 12 gauge gun, whether single shot or over-under shotgun. Magnum split barrel band base mounts without tools or dismantling. Features 1″ Swivels (#1591-2) Fits most single barrel 12 gauge guns, 0.850″ to 0.900″ diameter Fits most single barrel 12s. (.850-.900 dia.) Swivel – QD115 SG1 End of lstUrls_of_images_in_html_description