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I had never seen one of these until a few days ago now in less than seven days two fall into my lap. These are Snap-on M-10-DG breaker bars - 9/32 drive. They carry the same part number but have quite a few differences.
The first difference is the length. They are about 3/8 different.
Next is the direction of the stampings. Also one is presented as M-10-DG the other without the dashes M 10 DG. Made in U.S.A. is present on both but in different locations and one line vs two.
The patent numbers are the same but reversed from one to the other.