[opt] CECSCB179-66 [opt1] 4.5" x 4.5" LH [opt2] 10BL Satin bronze, lacquered, (Base Steel), 6 Wires (4 28 AWG, 2 24 AWG), Five Knuckle Concealed Bearing Standard Weight Full Mortise CE Electric and Concealed Switch Butt Hinges