The Caldwell Universal pistol loader Mag charger makes hand loading pistol magazines two times faster! the Universal pistol loader works with both single-stack and double-stack magazines. It loads 9mm, 10mm,.357,.40cal and.45 Cal ammo. All you have to do is drop in a round and squeeze the lever. The adjustable side shims align magazines of any width for optimal use. The shims are labeled with numbers for quick adjustment. The lock knob keeps virtually any size magazine secure and the robust polycarbonate construction will hold up for years of useSpecifications and Features:Works with both single-stack and double-stack handgun magazinesLoads 9mm, .357, .40 S&W, .45Cal and most .380 ACPSimple to Use- just drop in a round and squeeze the levelExtremely durable Polycarbonate constructionAdjustable side shims align magazines of any width for optimal Use. Shims are labeled with numbers for quick adjustment