Details: *Made of high quality material, durable and practical to use. *The spring ball lock ensures a tight fit into the driver head to prevent slipping during use. *Specifically machined to fit securely into a hand held driver, drill driver or impact wrench. *Material: Chrome Vanadium Steel *Surface treatment: Nickel plating *Color: Black+Silver *Size: As picture show *All Sockets Standard 1/4" Hex Shank *Specification(Approx.): 1/4 (6.35mm), 3/8 (9.5mm), 1/2 (12.7mm) *Quantity: 6pcs Package Included: 6*Socket Adapter Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.