Oil pressure safety switches should always be used in conjunction with electric fuel pumps.
This switch activates the fuel pump during startup as soon as the oil pressure rises to 7 psi.
The safety switch stops the electric fuel pump when the engine stops and oil pressure drops, even if the ignition switch is still in the "On" position.
Can be used to control other devices, based on engine oil pressure, or to protect engine from damage should oil pressure unexpectedly drop below 7 psi.

Easy to install - use a tee fitting if there is already an existing oil pressure gauge
Switch material: steel and plastic
1/8" male NPT
3 terminals
Includes instructions and wiring diagram