This kit comes in handy when you have to travel with your airguns. TSA requires that the bottles are empty and may ask you to disassemble it to show that it is empty.
Attach the red bottle clamp/handle onto the bottle and tighten with Allen wrench. The red bottle clamp is lined with silicone pads, it does not mark your bottle.
Attach black valve removal wrench to valve.
Insert the included red knurled screw into the valve removal tool in area of valve and release the air.
Once the tank is empty, use the wrench with the clamp to slowly unscrew and remove the valve.