These are new old stock. Unused. These are USA made from the early 1980s. I have a few cases of each left. Sizes are below. Here you are getting 10 3/8 Drive sockets. These fit metric and standard. 

3/8" Drive : 3/4"x19mm 11/16"x17mm 5/8"x16mm 19/32"x15mm 9/16"x14mm 1/2"x13mm 15/32"x12mm 7/16"x11mm 3/8"10mm & a 5/8"x16mm Spark Plug Socket

Made In USA Designed by the Metrinch Tool Company in St. Paul, Minnesota in the 1980s Items are New & Sealed, New Old Stock (The packaging may have shelf wear from weight of sockets and age) Sockets are 12 Points: 6 Points SAE Standard & 6 Points Metric These are NOT the modern style Metrinch sockets which are high-priced, made in Taiwan, and based on a 6 point (or lobe) design. 

Manufactured by National Hand Tool in Texas.