Specifics and features: Condition: 100% Brand New Type: Deep Impact Sockets System of Measurement: Metric Size: 29-38mm (As shown in the picture) Drive Size: 1/2in All Sockets Are 1/2″ Square Drive & 76mm Deep (From Top To Bottom Of Socket) With 6 Sides (Hex Shape) Made of heat treated chrome molybdenum steel with a corrosion-resistant black phosphate finish High-contrast size marking is permanently laser and easy to read. Use On All Air Powered & Battery Powered Impact Tools/Wrenches, Also Breaker Bars/Strong Arms & Torque Wrenches .