I am also selling this on other platforms, so please comment before purchasing. Thank you. Drive size: 12.7mm Size: 3/8 inch Height: Approximately 35mm Made by KTC (Kyoto Tool Co.) This is a vintage socket from about 60-70 years ago. It's old, so there is some deterioration and scratches, but it doesn't show extreme signs of use. I have polished it, so it has a decent shine.