Features:* .* The impact socket adapter material is chrome vanadium steel, which maximizes the tool's service life and longevity.* The socket adapter set is suitable for serious mechanic hobbyists and DIY fans alike. They can use them to repair auto parts and maintain households, machinery, motor vehicles, automobiles, and so on. Specifications:* Material: Chrome Vanadium Steel* Color: Silver* Size: As Picture Shown* Quantity: 7 PiecesPackage Contents:1x1/2 Inch Universal Joint Swivel Socket Adapter1x3/8 Inch Universal Joint Swivel Socket Adapter1x1/4 Inch Universal Joint Swivel Socket Adapter1x3/8 inch (F) to 1/4 inch (M) reducer1x1/2 inch (F) to 3/8 inch (M) reducer1x1/4 inch (F) to 3/8 inch (M) adapter1x3/8 inch (F) to 1/2 inch (M) adapterNotes:1. The actual colors 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.