The HKS Speedloader securely holds rounds until released with a slight twist of the knob, allowing for faster reloads and shooting. Strong metal points secure cartridges in the loader until released. The textured aluminum knob is easy to grip, and the polymer body keeps the tool light, making it easy to grab and quick to align with the revolver chamber for the reload. HKS Speedloaders have been proven by decades of use in law enforcement.Specifications and Features:-Loads 5 Cartridges into Revolver Instantly-Popular Twist Knob Design-No Cartridge Jiggle-Fits a Medium-Size Speed Loader CaseCaliber: .38 Special/.357 MagnumMaterial: Injection Molded Delrin Plastic with Aluminum KnobFinish: Matte BlackMade in the USAFits: S&W 36, 37, 38, 40, 42, 49, 60, 337, 340, 360, 637, 638, 640, 642, 649, J-FrameCharter Arms 85, 605, 651, 851Taurus 85, 605, 650, 651, 850, 851Rossi 68, 88, 351, 352Ruger SP101, LCRDan Wesson 738PNote: Some revolvers with oversized grips may interfere with the speedloader.