Features and Benefits:

• Impact grade
• Includes rail storage rack
• Sizes include: 1/4 in. Dr: 1/4 in., 5/16 in. and 3/8 in.; 3/8 in. Dr: 7/16 in., 1/2 in., 9/16 in., 5/8 in., 11/16 in. and 3/4 in.
• Black oxide finish

This is a hex bit socket set. It has 9-pieces. It is 1/4 in. drive.