The Shock Inflation Tool is the proper tool to adjust the shock pressure in your nitrogen filled shocks. To adjust the shock pressure, install the inflation tool and thread the end of the tool onto the schrader valve of the shock until the gauge reads a pressure. Refer to your shock instructions for the recommended pressure.To reduce the pressure in your shock with the tool installed, press the pressure release button on the tool on the opposite side of the gauge to the specified pressure. To increase the pressure in the shock, remove the tool and inflate the shock with nitrogen. Re-install the tool and adjust down the pressure as needed with the pressure release button on the tool.