Features and Benefits:

• Set includes: 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., 1-1/16 in., 1-1/8 in., 1-3/16 in., 1-1/4 in.,1-5/16 in., 1-3/8 in., 1-7/16 in., 1-1/2 in..
• Forged from the highest quality chrome molybdenum alloy steel for long life
• Packaged in compact blow molded case for durable, convenient storage and transport
• 12 point design means less wear on fasteners

This is an impact socket set. It has 19 pieces. Sockets are 1/2in. drive and 12 point.