Bulldog Winch Automatic Tire Deflators Brass Set of 4 Brass. Simply set the desired pressure in the workshop or on the trail and it will deflate your tires to that pre-set pressure. Once the desired pressure is reached simply release the deflator from the tire valves and the machined brass components will have deflated your tires to that pre-set pressure. Once the desired pressure is reached the deflator will automatically deflate the tires to the pre-set pressure and you let it ride out the adventure. Each deflator deflates each tire to that pre-set pressure. Position can easily be adjusted and locking nut provided to ensure once set it will not shift or change. All deflators come with a premium storage case. Specifications for Bulldog Winch Automatic Tire Deflators: Manufacturer: Bulldog Winch Application: Car Fabric/Material: Brass Quantity: 4 Color: Brass Condition: New Features of Bulldog Winch Automatic Tire Deflators Setting Ranges from 5 to 30 PSI - Factory pre-set at 15 PSI Quickly air down 4 tires at ttrail head Simply thread onto tire valves and deflators deflate tires to a pre-set pressure - Remove and head out on your off-road adventure High quality machined brass components Easily adjusted and position secures with locking nut Premium storage case included Deflating tires to a lower pressure improves off-road traction and smoothes out vehicle ride Package Contents: Bulldog Winch Automatic Tire Deflators Bulldog Winch 42068: Automatic Tire Deflators Brass Set of 4 Brass