Heavy-Gauge, Double-Wipe Copper Alloy Contacts * Easy-To-Wire Terminals Accept up to No. 4 AWG Conductors * Terminals Marked for Easy Identification and Fast Wiring * All Mounting Hardware Included * Surface-Mount Devices are COMERCIAL GRADE and have Concentric Knockouts for 3/4-Inch and 1-Inch Conduit And Adjustable Cord Clamp for Back and Bottom Entrance of Cable