Caldwell Shooting Mag Charger Universal Pistol Loader -Loads 9mm, 10mm, .357, .40 and .45cal ammo. Simple to use - Just drop in a round and squeeze the lever. Extremely durable polycarbonate construction. Adjustable side shims align magazines of any width for optimal use Shims are labeled with Numbers for quick adjustment Lock knob keeps virtually any size magazine secure Robust polycarbonate construction for years of use Ergonomic die cast aluminum handle for easy use and "no flex" operation