Description: 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. 1/2" Deluxe Axle Nut Impact Sockets Set, 9pcs. 2. All Sockets Are 1/2" Square Drive & 76mm Deep (From Top To Bottom Of Socket) With 6 Sides (Hex Shape) 3. Material Type Chrome molybdenum alloy steel. 4. Set Sizes Include: 29mm - 30mm - 31mm - 32mm - 33mm - 34mm - 35mm - 36mm - & 38mm All by 1/2" Drive .