Leviton CS420-2E 20 Amp, 120/277 Volt, Toggle 4-Way AC Quiet Switch, Commercial Grade, Grounding, Black Heavy-Duty Pre-Plated Steel Mounting Strap for Maximum Strength All Screws are Brass Combination-Head for Fast Installation with Standard, Phillips, and Robertson Head Screwdrivers External Clamp-Type Wiring Terminals Provides Secure Connection of Solid or Stranded Wire for Back or Side Wiring (CSB1 and CSB3) Backed by a Limited Ten-Year Warranty Listed UL Federal Specification, WS 923