3M™ Scotchlok™ Locking Fork is a lug connection terminal that allows rapid connection of wire and are usually used on free-standing studs, because of the wider tongues. The spring-like tongue locks into place around the stud. Even when the mount screw is not tightened, extra force is required to remove it from the stud. The terminal has a vinyl-insulated, butted-seam barrel and withstands temperatures of -40 to 221 degrees Fahrenheit (-40 to 105 degrees Celsius). Electrolytic copper construction offers good conductivity and a tin-plated finish resists corrosion.