The Pachmayr PKMYR Speedloader is specifically designed for S&W K Frame revolvers and holds 6 rounds of .357 Magnum ammunition. Unlike competitors, this speedloader is precision CNC machined from solid aluminum, ensuring durability and performance. Its polygonal design minimizes outside dimensions, allowing for easy fit in compact revolvers. A rattle eliminating O-ring keeps cartridges securely in place, and rounds are released simply by twisting the large knurled knob.Key FeaturesCapacity: Designed to hold 6 rounds of .357 Magnum ammunition.Construction: Made from solid aluminum for superior durability compared to plastic models.Design: Polygon shape for minimized dimensions, ensuring compact fit.O-Ring Feature: Equipped with a rattle eliminating O-ring that securely holds cartridges.