The HKS 451 Single Stack Mag Loader is constructed of durable plastic with a black finish. This adjustable loader allows for efficient loading of various single stack magazine types, including those compatible with Colt, Ruger, Sig, S&W, and Taurus firearms.Key FeaturesMulti-Caliber Compatibility: Designed to work with multiple calibers including 9mm, .45 ACP, .38 Super, .40 S&W, and 10mm Auto.Loading Speed: Capable of loading 15 rounds in 18 seconds when used with single magazines.Model Fit: Specifically fits 1911 style magazines and other large frame single line mags.Style: Ideal for competition use.