Material Chrome Vanadium SteelNumber of Pieces 6About this itemMade from hardened and tempered chrome vanadium steelSpring loaded ball bearingsMade from hardened and tempered chrome vanadium steel, this 6 piece adapter set is a must-have for DIYers and mechanics. The adapters are corrosion resistant, highly polished and nickel plated and feature a spring loaded ball bearing. You will appreciate the storage bracket which is very convenient for you.Various sizes: 1/4F x 3/8M, 3/8F x 1/4M, 3/8F x 1/2.M, 1/2F x 3/8M, 1/2F x 3/4M, 3/4F x 1/2MThe included plastic box is easy to carry