Abstract: A device and method is provided for identifying a set of tool sockets. In one embodiment of the invention, the device includes a body that is adapted to be mated with a tool socket, and an identifier disposed on the body to identify the tool socket. The body includes a first portion that is adapted to be inserted into the tool socket, and a second portion that is adapted to protrude from the tool socket when the first portion is inserted into the tool socket. The identifier is disposed on the second portion and is viewable when the first portion is inserted into the tool socket. A plurality of socket plugs of various sizes can be provided for identifying each tool socket in a set of tool sockets. A socket plug corresponding in size to each tool socket is selected and inserted into the tool socket to identify the particular socket.