This Harmony 9001K selector switch head, with an E10 black key operated handle, has 3 positions and operates with a stay put mechanism. It has a chromium-plated metal bezel. It is easily installed into standard 30mm diameter panel cut-outs and connected to control circuits with classic screw-clamp connections. It is impact-resistant, dust-resistant, water-resistant, and vibration-resistant thanks to its IP66 rating, making it ideal for operation in harsh environments. It complies with many international standards and certifications, such as UL 508, NEMA, EN/IEC 60947-1, EN/IEC 60947-5-4, CSA C22.2 No 14, EN/IEC 60947-5-1, and UL 508. Harmony 9001K is a range of heavy-duty chromium-plated metal pushbuttons, selector switches, pilot lights, and specialty operators.