This is a speed loader for Mark IV Factory Magazines The Heavy Duty Designed is for use with original factory Ruger Mark IV magazines Proudly made in the U.S.A. by military veterans (Magazine not Included). No More Sore Fingers or thumbs This loader has the extra-large, thicker finger grips, for easier loading. No more sore fingers from grabbing the tiny little slide grip that is on the factory magazine. Simply place it over the magazine and press it down with both fingers. The wider finger grips ensure a non-jamming easy sliding loading operation. Black in color, so any carbon, or residue stains will not show. Satisfaction Guaranteed ***** This will not fit the Ruger LCP II pistol magazine *****