Product Description - This listing is for two of these.
HKS, Speedloader, 357 Magnum
Fits: S&W 686, Ruger GP100
Why load your revolver one cartridge at a time With one slight twist, the HKS Speed Loader instantly loads all the cartridges into your revolver. Strong metal points hold cartridges securely in the loader until you release them into the revolver with a turn of the speed loader knob.
Smith & Wesson 586, 686, 581, 681