Nothing could be more straightforward than using the Caldwell Mag ChargerA(R). Just drop in one round, squeeze the lever and voila! Makes for quicker magazine loading without jamming your thumb. Features & Benefits702666i_ts Simple to use, just drop in a round and squeeze the lever Universal magazine design, works with single- and double-stack magazines Adjustable side shims align magazines of any width Shims are labeled with numbers for quick adjustment Lock knob secures nearly any size magazine Ergonomic die-cast aluminum handle for easy "no flex" operation Extremely durable polycarbonate construction for years of use Loads 9mm, 10mm, .357 Magnum, .40 S&W, .45 ACP, and most .380 ACP ammo Order today!