Features and Benefits:

• Set includes: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm and 19mm
• Forged from the finest chrome molybdenum alloy steel - the best choice for strength and durability
• Radius corner design - to extend the life of fasteners
• Included in a heavy molded storage tray

This is an impact socket set. It has 10 pieces. Sockets are 1/2 in. drive.