Many Uses in One Simple Tool

We do not need to carry various tools to be ready for unexpected situations.

Dive gears are already heavy enough 

Dive gears are already heavy and baggage allowance is limited.

The tools are getting rusty

The tools using on a boat or at the coast are easy to get rusty.

When you need the tool underwater

In case of cave or wreck dive, the tool would be needed underwater as you may have the cylinder gets damaged.