Size:1/2 metric 1/2 Inch Socket Set Include: 10 x 1/2\ Dr Metric Socket :10,11,12,13,14,15,17,19,22,24 mm 1 x Dr.Extension Bar:4.9\ 1 x Dr.Quick release ratchet handle Advantages: Made from forged and heat treated chrome vanadium steel construction, provide you longer service life even under high pressure work. Included 4-Inch extension bar help you reach the hard places. Thanks for the 24-tooth oval head ratchet which needs only 15-degree swing arc and the quick-release drive tang prevents dropped sockets. The reversible ratchet turns both clockwise and anti-clockwise and has a quick release button for changing the socket easily.