WINDFIRE 1" 25mm Ring Offset Side 45&deg;W/Picatinny Rail Mount for Flashlight Torch Scope Picatinny Rail Offset 20mm Rail Mounts for Scopes Laser Tactical Flashlights -Black Fits all flashlights with 25mm/1" diameter High grade aluminum construction Offset Flashlight/Laser weaver/picatinny style mount Compatible with all weaver/picatinny style rails It can be installed to 20mm Standard Weaver Rail Rail Size( mm ): 20mm-22mm