Premium quality inflation air blocks are made of chrome plating for greater durability and corrosion resistance. Well-designed, smooth and clean surface. Universal fitting - The ID hose barb end makes it the perfect choice for hose repairs, suitable for vehicle tire inflators such as cars, vans and trucks, etc. Precision design - The spring pushes in easily and is strong enough to stay in place, while the air clamp end locks the flow clamp open, making tire inflation easy. Easy to use - press the locking clip, push or twist the air chuck into the valve stem until it is tight, then release the locking clip.