1/4 Inch Socket Set Include: ✔ 10 x 1/4" Dr Metric Socket : 4,5,6,7,8,9,10,11,12,13 mm ✔ 1 x 1/4" Dr.Extension Bar:4" ✔ 1 x 1/4" 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.