These came out of very large a Red Snap on rolling anniversary edition toolbox. If I had to give an opinion I’d estimate them being atleast 20+ years old. I cannot specify the exact date but everything in the toolbox is from very nice and quite expensive brands for example blue point, MAC, and of course Snap On. They belonged to a great friend of mine who owned a semi truck maintenance and repair shop. I haven’t tried to clean anything beyond using a dry blue paper tool towel roll and just due to general lack of knowledge in that area, especially black oxide. If you have recommendations or are knowledgeable in this category and have any advice that’d be great and I will look into it because there is quite a bit of this style throughout the entirety of what I’ll be posting but nothing seems to be actually dirty or greasy like you would think tools would be. Also there seems to be a theme of one tool or one size used out of an entire set of the particular tool and even those don’t look hardly used at all. This set has the original plastic that slips right into and out of the drawer slot that seemed to be designed for them or perfectly fit to where these were held in so maybe someone has been looking for this replacement for a long time! The black specs seemed to be maybe paint or something along those lines because that will actually start coming off but it’s hard kind of like dried paint. He was not just a dear friend but also my neighbor for the past ten or so years and as long as Ive known him I never ever really saw him use the snap on toolbox as he had been retired for some time when we became neighbors and really didn’t use many of his hand tools anymore, lots of power tools but not to many manually. I’ve never even seen this style of tool before discovering the drawer and researching them with photographs, considering age and what they are used for I’m going to say they seem to be in really great condition. Some possibly if not most of them haven’t been used but at close glanceit’s possible one has been used. I can’t really tell due to lack of knowledge. I just know that I can’t find any other ones that look this nice that date to the era of this toolbox or in the original plastic with this serial number on it. I will happily take more pictures or anything you need just send me a message and I’ll happily help in any way I can, maybe you would want closer pictures or something I don’t know just let me know if there’s anything can do. I tried to picture all angles. There is lots of other tools that are black oxidized Snap-On Tools. I’m sure there’s somebody out there with the exact same anniversary rolling tool box that could use a perfect replacement. Thanks for looking or purchasing, check my auctions for more tools from the same box. Some of that I’m still trying to figure out exactly what it is as I know some things about tools, but some of it is very specific like I mentioned before he owned and ran a diesel truck repair and maintenance job for well over 25 years. Some are easier to decipher then others, It seems like some of the items have a specific job or task or were used to work on a particular vehicle type. Thanks and I hope you I made some sense explaining it. Message me for anything you’d like to know or see.