Swivel socket
The image depicts a universal joint socket, also known as a swivel socket, likely a vintage S-K or Craftsman 3/8 drive. The markings S-K • 45190 are visible on the socket. It's designed to provide flexibility when working at angles. Key details: Type: Universal joint/swivel socketDrive size: 3/8 inchBrand: Likely S-K or CraftsmanMarking: S-K • 45190Function: Enables working at anglesCondition: Used, with some play in the jointsMaterial: ChromeOrigin: Made in the USA