Works with most factory Glock flat floorplates. Works with 10 round, standard capacity, and high capacity Glock magazines. Simply insert the hook from the small lever into the floor plate, rest the MagPopper body against the front of the magazine body. With one hand grasp the MagPopper and the magazine body and gently squeeze. The floor plate will slide forward and unlock from the side magazine tabs with very little effort. MagPopper also features: a bottle opener, a hole on the main body for mounting onto key rings, and a '' hex hole for holding '' screwdriver bits.