Features and Benefits: 9-pin design fits retaining nut on 2-wheel and 4-wheel drive Avalanche, Cheyenne, Escalade, Sierra, and Silverado trucks with 10.5 - 11.5" ring gears.; Use with 1/2" drive; Alloy steel construction; Precision Crafted; Satisfaction ensured; 9-pin design fits retaining nut on 2-wheel and 4-wheel drive Avalanche, Cheyenne, Escalade, Sierra, and Silverado trucks with 10.5 - 11.5" ring gears. Alloy steel construction with 1/2" square drive.