Valve adapter with drain valve: car valve lever plug air chuck allows quick inflation and deflation. Press the bleed valve to deflate the air from a crowded tyre and easily adjust the tyre pressure. Press with a release valve to deflate, the air pressure is safer. Quick connection: universal external thread connection 7.8 mm to quickly make on the tyres. Same thread as American and French standard tyre valves to quickly manufacture on the tyres, no air leakage. Material: the tyre chuck is made of high-quality plastic and solid brass, which is wear-resistant, it is extremely strong and durable for long-term storage and use. Easy installation: the tyre collet comes with a switch. Press the lock to lock the tyre nozzle when using it to create a more secure connection. You don't need to hold it by hand, inflating is quick and easy. Widely used: easy to install and replace, suitable for 8 mm diameter pore hose. Car air pump can be used in all vehicle fillers, suitable for your car, motorcycle, bicycle, truck, air pumps, industrial and garage air duct systems.