3/8 in. Drive SAE and METRIC Deep Well 6-Point Socket Set (20-Piece)Milwaukee's 6 Point Sockets with FOUR FLAT sides feature an innovative design with 4 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. These two 10 piece sets are stored on socket rails for tool organization and are both backed with our Lifetime Guarantee. Includes: (1) 3 8