Description: 9pcs 1/2″ Deluxe Axle Nut Impact Sockets Set Use On All Air Powered & Battery Powered Impact Tools/Wrenches, Also Breaker Bars/Strong Arms & Torque Wrenches. Each Socket Has A Drilled Head To Locate Retaining Ball Bearing On Most Breaker Bars & Impact Wrenches To Ensure A Safe Secure Fit. Feature: 1. All Sockets Are 1/2″ Square Drive & 76mm Deep (From Top To Bottom Of Socket) With 6 Sides (Hex Shape) 2. Material Type Chrome molybdenum alloy steel. 3. Set Sizes Include: 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm and 38mm Sockets All by 1/2″ Drive .