Drop forged, heat treated, chrome molybdenum.

• 12 pc set
• Deep
• 3/8" Drive
• Radius corner design contacts only flat surfaces of fastener
• Sockets Sizes:
  • 5/16", 3/8", 7/16" , 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", and 1"