These professional quality hand tools are made in the U.S.A.- High strength alloy steel construction assures long life even under the toughest conditions.- Sockets feature lobular openings for greater torque - Large size markings for easy identification - Chamfered openings which allows quicker, easier engagement between fastener, socket and drive tool. The 12 point opening permits socket engagement on fasteners every 30 degrees rather than 60 degrees for better access in restricted areas. This set includes the following sockets:This set includes the following sockets - 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"Bahco Tools North America is a subsidiary of Snap-on Incorporated that has been in existence for about 100 years. You will find it hard to come up with a series of tools that offer the same power, flexibility and ease of use as these tools.