SPANNERS
Noun
spanners
plural of spanner
Source: Wiktionary
SPANNER
Span"ner, n.
1. One who, or that which, spans.
2. The lock of a fusee or carbine; also, the fusee or carbine itself.
[Obs.]
3. An iron instrument having a jaw to fit a nut or the head of a
bolt, and used as a lever to turn it with; a wrench; specifically, a
wrench for unscrewing or tightening the couplings of hose.
4. pl.
Definition: A contrivance in some of the ealier steam engines for moving
the valves for the alternate admission and shutting off of the steam.
Source: Webster’s Unabridged Dictionary 1913 Edition