Fastest Cordless Tire Inflator. The Milwaukee M12 Compact Inflator delivers fast, accurate, easy inflation with the portability to take anywhere. The inflator has the capability to complete demanding applications like car, LT truck, and compact equipment tires, the M12 Compact Inflator gives users ultimate power and efficiency. Rated to deliver over 120 PSI, The high efficiency motor and pump top-off car tires in under 1 minute. The True Fill Auto shut-off technology delivers highly accurate pressure, protects from overfill, and automatically senses speed of fill to deliver precise shut-off at the desired PSI. Additionally, the unit includes a large easy to read back-lit LCD, anti-vibration feet, and 26 -Inch hose with an all brass Schrader chuck.