This handy tool holds your CP tank regulator securely while you remove, install, or work on the regulator. Simply attach the tool to your workbench with two 5/16-18 screws (not included) or clamp it in a vise. New design is adapted to fit CP regs and most regulators by other manufacturers Fits Ninja, Powerhouse, HK Army, Empire, Immoral Air regulators. (does not fit Crossfire or Guerrilla Air, Center flag 420.)