Features and Benefits:

• Semi deep impact sockets are designed to provide added reach over standard sockets, yet fit in tight spaces where deep sockets are too long
• Nose-down design extends the taper as far as possible, for improved access over straight wall designs
• Durable steel construction, black oxide finish, markings
• Sizes include: 5/16 in., 3/8 in., 7/16 in., 1/2 in., 9/16 in., 5/8 in., 11/16 in., 3/4 in., 13/16 in.,7/8 in.,15/16 in., 1 in., with universal joint

This is an impact Socket set. It has 13-Piece. Sockets are 3/8 in. drive.