Wrenches and Keys

A set of keys will always be useful when you want to do some DIY at home or in the garage. A hex key can be used when you need to disassemble a device (when you need to remove the facade of the boiler, work on the water heater, etc.) for repair or maintenance.
A ratchet wrench is useful when you want to unscrew a part in a cluttered or tight space. It is generally used to maintain a device, such as air treatment equipment.
The multifunction gas key will be helpful when you need to open the technical closet in the hallway of a building. It is also useful for opening a door where the lock does not have a handle. Different shapes give the multifunction gas key its form, each with a specific utility.