Specification: <br /><br />Brand new<br /><br /><br />Hardness: 60HRC<br /><br /><br />Color: black， as picture shows<br /><br /><br />Quantity: 4pcs per set<br /><br /><br />1/2 "to 3/8" - (12.5mm square hole to 9.5mm square head) Length: 36mm<br /><br /><br />3/8 "to 1/4" - (9.5mm square hole to 6.3mm square head) Length: 26mm<br /><br /><br />3/8 "to 1/2" - (9.5mm square hole to 12.5mm square head) Length: 35mm<br /><br /><br />1/4 "to 3/8" - (6.3mm square hole to 9.5mm square head) Length: 25mm<br /><br /><br />Height: about 25mm， 26mm， 35mm， 36mm<br /><br /><br />Made from Chrome Vanadium Steel<br /><br /><br />This set allows you to mix and match drive sizes for your sockets， ratchet handles， extension bars and other accessories.<br /><br /><br />Ideal tool for mechanics， engineers， carpenters or DIY enthusiasts<br /><br /><br />Sprung Ball bearing fitting retainer<br /><br /><br /><br />Package included:<br /><br />4pcs x ratchet socket adapter reducer converter<br /><br />Note:<br /><br />Please allow 1-5mm errors due to manual measurement<br /><br /><br />Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same<br /><br /><br /><br />