-Many uses: with 1/ 4 inch female national pipe threads, the air chuck can be applied for trucks, buses, cars, motorcycles, bicycles, etc. -Easy operation: the tire chuck adopts a push-in chuck design; No need to thread the chuck onto valve stems, just push the chuck onto the valve for a nice seal -Multi function: 2-in-1 dual head tire chuck has the function of checking pressure and inflation; The 1/ 4 inch NPT threads make this gauge fit for most tire inflators -Good quality: made of chrome-plated iron and zinc alloy, can be applied repeatedly for many times; There is no need to worry about rusting, tarnishing or damaging -Quantity: each package come with 2 packs air chucks, small sizes allowing easy carrying and storage, can meet your different requirements