Manual pressure, vacuum pump is a device with many applications. It generates negative pressure up to -1 BAR. It is used to check car systems that operate on negative pressure. The set allows for diagnosing all diesel and petrol combustion engines in virtually every engine or system.
The whole thing allows you to start working right away, without buying additional accessories. Checking the correct operation of brakes, pressure sensors and many other things contributes to the safety of passengers, as well as the person driving the car. Stay safe, don't risk the lives of others.