With this mount adapter， you can use your weaver based scopes， lasers， flashlights and other accessories on your dovetail based weapons.Features:Fits dovetail 11mm rail.Dovetail rail extension.For using your weaver based scopes， lasers， flashlights and other accessories on your dovetail based weapons.Specifications:Color: BlackMaterial: Zinc alloyLength: 10cm / 3.9inWeight: 62g / 2.2ozPackage List: 1 * Rail Mount Adapter1 * Wrench