Features: *Made of chrome-vanadium steel for durability and long service life. *1/4" 3/8" 1/2" 360 Degree Rotatable Electric Drill Socket Adapter for Impact Driver with Hex Shank to Square Socket Drill Bits Extension. *There are 3 adapters of different sizes for you. *Common size combinations multiply the range and capability of many electric tools. Specifications: *Material: Steel *Color: Black *Size: 1/4", 3/8", 1/2" *Shank: 1/4in (6.35mm) hex shank *Length: 50mm (Approx) *Quantity: 3pcs Package Included: 3*Socket Adapter Notes: 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.