This is a 21 Piece Snap-On Metric Deep Well Socket Set - 3/8 Drive 6 point. This is a set that was made for the Military. Includes all of the sizes from 6mm to 26mm. Sockets are coated with a very thin layer of protectant oil, which can be wiped off with wd40. Most are from the early 1990's.
Actual items pictured are for sale. If you are not happy with the item, then send it back.
The item "Snap On Metric Deep Well Socket Set 21 Piece 3/8 Drive 6 point Chrome USA Made" is in sale since Tuesday, September 10, 2019. This item is in the category "eBay Motors\Automotive Tools & Supplies\Hand Tools\Sockets & Socket Sets". The seller is "mocityman" and is located in Stafford, Texas. This item can be shipped to United States.