A single Gib key for the standard Lister CS or L type engine key way at 9/16" wide.
If you are having or have had trouble removing one of the little blighters why not take a look at our custom made Gib key pullers by clicking here.
Don't forget that to fit a Gib key properly you will need some Micrometer Blue!
Further reading on the subject of all things "Gib head key" related can be foundin Eric Brains excellent Stationary Engine Magazine article.