This snake coupling key pin is from Ridgid. It is used for disconnecting 1/2-inch cables. Ridgid part number 59225.
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: #35458
Manufacturer Number: 59225
Manufacturer: Ridgid