Standard Duplex Receptacles - CO/ALR feature side wire terminals accept up to #10 solid or stranded copper or solid aluminum wire. Terminal screws backed out — ready for wiring. Combination slot/Phillips head mounting and terminal screws ease installation.Design Features:• For direct connection to aluminum or copper wire• Double-wipe ground contacts ensure long-term ground retention• Combination Slotted/Phillips head mounting and terminal screws for installation flexibility• Easy access split circuit break-off tab• Terminal screws backed out and ready for wiring• Side wire terminals accept up to #10 solid copper wire or solid aluminum wire