# Start Source

Use the tool start source to set how to start the tool. The default value is Trigger only.

Start Source is available only for certain tool types.

Options for start source
Start source | Description
--- | ---
Trigger only | Press the tool trigger to start the tightening.
Trigger OR Push | Press the tool trigger or push the tool against the joint to start the tightening.
Trigger AND Push | Press the tool trigger and push the tool against the joint to start the tightening.
Push only | Push the tool against the joint to start the tightening.
Digital input | Have a signal using digital input to trigger the start of the tightening.
Safety trigger | Two triggers (as with trigger and push) activated within 500 ms from each other to start the tightening.