Choose a 3M™ Electrical Spring Connector 512G when you need to be able to accommodate numerous stranded or solid copper wires. It holds solidly to create reliable electrical grounding, and the internal spring is made of steel with a corrosion-resistant coating so it will last over the long-term. A pair of wings let you install this electrical spring connector easily with high torque, and it stands up to an operating temperature as high as 221 deg Ft (105 deg C). This electrical spring connector is UL Listed, CSA Certified and RoHS 2011/65/EU Compliant.