The Freeman FS3DTI Digital Tire Inflator with 90 Degree Lock-On Chuck is ideal for helping to optimize gas mileage and extend the life of the tires on your car, truck, motorcycle, ATV, and bike. Used in conjunction with an air compressor, this tire inflator makes it easy to inflate tires quickly and accurately at home or in the shop. Connect the heavy duty steel 90 degree lock-on chuck to your tires and measure pressure in increments of 0. 1 PSI. The flexible 20" rubber swivel hose will allow you to use the digital tire inflator even in tight spaces. Lightly squeeze and hold the pistol-style trigger at the first position to deflate, or completely depress the trigger at the second position to inflate. The LCD screen is backlit for increased visibility, and you can switch between PSI, Kya, Bar, and Kg/cm² for the most accurate reading. The Digital Tire Inflator with 90 Degree Lock-On Chuck is constructed of durable, lightweight composite nylon, has a protective rubber covering and rust-resistant brass fitting to ensure a long product life, includes two AAA batteries, and is covered by Freeman's 1 Year Professional Tool .