An oil based paste for indicating high spots on key ways, machine bearings, machine tool beds etc. Easily removable with methylated spirit.
Stuarts Engineers Micrometer Blue gives a clear perfect mark on any metal, in any light and being a lubricant cannot damage bearings or other working parts.
An essential requirement for anybody attempting to correctly fit a Gib key etc. Supplied in a compact 32gram tube to keep the product fresh for a long time.