Milton’s S-522 dual-headed tire chuck bayonet-style tire inflator excels in reaching dually truck tires. Dual head chucks make truck/tire valves more accessible with two heads for easier access. This tire inflator features an easy-to-read jumbo white nylon indicator bar with readings at 2-pound increments. Combine that with an ergonomic lever and this inflator allows you to finely tune your tire pressure. Please see below for more features and specifications.