For Collectors and History Buffs
The top is a M10B, its longer than the DG, also, the internal socket holder on the B is thicker, with thin external, this was changed on the DG
M-10 Nut Spinner
I don’t have a enough tools to say much about this. I have 2. Both are marked M-10-DG and are likely newer
Name
Description
Year first Appeared
Year Last Appeared
M-10CA
Nut Spinner (Breaker Bar)
1937
M-10B
1939
1942
M-10DG
common
1925-1926 fixed head pull bar. Marked Snap-On, no model number and not listed in any catalog. Extremely rare.