Hamuty Rail Mount,Tactical Flashlight Offset with Stand Shock and Recoil include Allen Key (Black) Fits all standard Picatinny or universal rail systems Comes complete with mounting hardware for easy installation Made of Solid Aluminum Alloy to with Stand Shock and Recoil. Install Flashlight onto any RIS 20 mm Standard Weaver & Picatinny Rail. PACKAGE:1x Flashlight Rail Scope Mount,1x Allen Key