One Piece Double screw mount adjustable for windage and elevation. Suitable for all spring guns / semi auto.22 rimfire rifles. Suitable for some pre-charged pneumatic air rifles such as BSA SuperTen and Weihrauch HW100. The maximum amount of adjustment is 2mm from one end of the mount to the other. This applies to the windage and elevation. N.B. Will clear 60mm objective lens diameter on most rifles. Includes removable arrestor pin.