Milton® #522 dual head chuck bayonet gauge specializes in reaching dual and dually truck tires. Dual head chucks make truck/tire valves more accessible with two heads for easier access. It has lever action and is made with heavy duty construction, providing long service life even with constant use. Valve and gauge cartridges are replaceable and combined in one easy unit. Includes a 12 in hose with a pressure range that offers 10 to 120 psi (2 lb increments) or 80 to 840 kPa (20 kPa increments). The air chuck has 1/8-27 NPT threads. Complete with a jumbo white nylon indicator bar for easy reading. With 1/4 in NPT threads, all Milton® hose whips are compatible for use and have interchangeable connections with any of the 4 Milton® bayonet inflator gauge bodies: #520 (straight chuck head), #521 (single chuck head), #522 and #523 (grip chuck head to lock onto valve).