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How does a boiler pump multitool work?

How does a boiler pump multitool work?

The tips of each bit are shaped to match the recessed part of the screws they are designed to operate,

The allen key bits are hexagonal and the screwdriver bits are flat. 

As the shape of the bit matches the indentation in the screw, it allows the tool to fit snugly into it. This means that turning the handle will cause the screw to rotate.

 

 

Turning a screw clockwise will tighten it

 

Turning a screw anti-clockwise will loosen it.

 

 

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