An interphasic coil spanner is a coil spanner used by Starfleet.
In 2372, after Miles O'Brien was subjected to an Argrathi artificial reality where he served twenty years in prison, Jake Sisko helped O'Brien refamiliarize himself with engineering tools, including an interphasic coil spanner. (DS9 episode: "Hard Time")
In 2376, Nog required an interphasic coil spanner as part of the attempt to prepare the USS Defiant for a battle against three Jem'Hadar starships. (DS9 - Avatar novel: Book One)