This heavy duty ABS housing resists impacts. Set screw holds wires firmly in place and terminals are coated to resist rust. Terminals clearly marked to avoid confusion. Designed with solid brass contact blades. ⚠ WARNING: This product can expose you to Lead, DBP,CD, BPA ,hexavalent chromium, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.