The Lisle Axle Hub Bridge Nut Socket for GM, No. 31550, removes and installs the hub bearing retaining nut found on some GMT900 platform trucks. The socket has nine drive pins to fit the new style retaining nut found on two-wheel and four-wheel drive Cheyenne, Silverado, Escalade, Sierra and Avalanche trucks with 10.5" or 11.5" ring gear. The socket is made from alloy steel and is used with a 1/2" drive.