Uncle Mike's Quick Detachable Fore End Band Style Sling Swivels (Blued, 1-Inch Loop) This 1 inches swivel and machine screw set has been created for guns with a for end band, such as lever action rifles and Mossberg 500 Shotguns Requires alteration of the tubular magazine 1 inches swivel and machine screw set Special machine screw base for mounting in tube magazine lever action rifles, carbines with fore-end band Also fits Mossberg 500 shotguns Gun alterations required Closed Link technology creates a permanent ring bond