ONE STROKE GAS CHECK DIE 9mm, 38/357, 40 S&W, 45 ACP, 44 MAGThe One Stroke Gas Check Die punches out Gas Checks fast, easily and cheaply! Installs on any single stage reloading press and Punches and Forms Gas Checks in one stroke. Makes gas checks from inexpensive and readily available Aluminum "Valley" Flashing. Punches and Forms Gas Checks in One Stroke Installs on Any Single Stage Reloading Press Uses Inexpensive Aluminum "Valley" Flashing Check out the video on how it works!!