Review on High-Performance 12V 4-Terminal Starter Solenoid Relay SW-3 Compatible with Ford, Jeep, Lincoln, and Mercury | Ideal for Hot Rods by Eddie Rivas

This magnet worked fine for about 3 days then the starter would not disengage when I started the engine. I ripped the wire off the ignition switch but it still didn't turn off the starter. I had to disconnect the battery to turn off the starter. It turned out that the rather rough copper contacts in the solenoid had been soldered together and the solenoid simply became a large conductor and not a high current relay. DO NOT BUY one of these, it could cost you dearly.