One of the best time saving pieces of equipment you will ever own! CAMPBOSS 4x4 Boss Air Tyre Deflators allow you to deflate all four tyres simultaneously to your chosen air pressure between 5-30 psi (laser etched increments at 10, 15, 20, 25 and 30psi. The peak of efficiency - no longer will you have to spend time down on your hands and knees painstakingly deflating each tyre. With the CAMPBOSS 4x4 Boss Air Tyre Deflators simply choose the tyre pressure required and let them do all the work for you! Quality stainless steel internal components, an anti-corrosive coated nickel-plated body and the laser-etched gauge gives the most accurate reading for precise pressures. A superior, long lasting product that will see you using them every time you go off-road. With an automatic shut-off at your pre-set PSI and a locking ring to maintains your pre-set pressure for next use, the CAMPBOSS 4x4 Boss Air Tyre Deflators will have your tyres at impeccable pressure in minutes, getting you off road and conquering any 4x4 adventure!