1 Inch Scope Mount/12 Gauge Mag. Tube for 1" Flashlight Laser Mount Dual Ring for Rifle/ Shotgun Material: Aluminum Alloy. 1-Inch flashlight or laser mount Mounts to a 1-Inch scope tube or 12 Gauge magazine tube Length 3.4-Inch. Weight 1.4-Ounce Screws stay locked dowm