992-7903 13-inch Macbook, Late 2006, Mid 2007, Clutch Block, Left, A1181, MA701LL/A NB-1758W This is a left clutch block for the A1181 MacBook 13" models released in Late 2006 and Mid 2007. This is the metal piece that is used to screw the display hinge into the base of the machine. Apple part number: 922-7903