Abstract: This invention relates to a measuring and tool setting device having a bridging cursor body 11 of plastics material, wood, metal or any combination of these with an integral locking cam mechanism 12 these acting upon a steel rule or scale 13 which passes through said body at an angle of 90 degrees to a datum drawn between the feet 14 of the body all of these foregoing in conjunction measuring the projection of a cutting edge from a relevant reference face the measurements being read as indicated on the rule or scale by the bevel 15 situated on the cursor body.