The MILWAUKEE SAE 3/8" Drive 10-Piece Deep Well Socket Set feature 6-point sockets with FOUR FLAT sides. This innovative design has four parallel flat sides, which deter rolling and are wrench-compatible. The socket sizes are stamped into the flats providing improved visibility. These deep well sockets have optimized geometry to reduce bolt rounding and stripping. This 10 piece socket set is stored on a socket rail for tool organization and is backed with a lifetime guarantee.