Pachmayr Speedloader, 357 Magnum, 38 Special, 6 Rounds, Fits S&W L Frame and Ruger GP100, CNC Machined from Solid Aluminum, Blued Finish 02654 Pachmayr's new revolver Speed loaders will set the standard for quality and performance. Unlike competitive models which are made of plastic" Pachmayr's Speed loaders are precision CNC machined from solid aluminum. The Speed loader bodies are cut in a polygon shape which produces the smallest possible outside dimensions and allows them to easily fit compact revolvers. The Speed loaders are also equipped with a rattle eliminating O-ring which contacts the cartridge bases and firmly holds the rounds in place. Cartridges are released with a simple twist of the large knurled knob.