The HomeWreker on/off ASA adapter allows you to quickly gas your HPA/CO2 launcher. A quick turn of the knurled knob opens the valve and allows the flow of gas. Close the valve and dry fire the launcher to remove any remaining stored gas in the air system. This on/off eliminates the need to remove your tank to degas your launcher. Leaving your launcher in a degassed or un-charged state extends its life by removing the high pressure gasses which overtime causes damage to internal seals and O-rings. Fits standard G1/2-14 valve threads on CO2 and HPA tanks.