This snake coupling key pin is from Ridgid. It is used for disconnecting 3/8-inch and 5/8-inch cables. Ridgid part number 59230.
How Disconnect Cables Using a Key Pin:
1. Fully insert key pin (rotate if needed) to depress the plunger pin.
2. Slide coupler apart.
EC Part Number: #35850
Manufacturer Number: 59230
Manufacturer: Ridgid