MSR fuel pump wrench

Wrench for unscrewing the pump for an MSR liquid-fuel stove from the fuel bottle. These pumps are used with lightweight backpacking stoves such as the WhisperLite and SimmerLite. This wrench makes it easy to unscrew the pump without putting sideways force on the valve stem.

This wrench has been tested to fit older pumps. Newer stoves appear to use a pump with a larger valve, which won't fit this wrench.

The wrench is available in two varieties: a conventional wrench with handle, and a m