Used by machinists to adjust cutting tools to exact distances, this gage is first set to the desired setting with micrometer, caliper, or height gage. The resulting cut is then precisely made with the first pass. Used on its base or end, the gage can be set from ¼” to 8 ½” distances. In the wood shop it makes a great gage for checking the squareness of drawers, cabinet shelves, etc. This one came from a fitted tool chest of a machinist who worked at the Atlas Tack Co. of Fairhaven, Mass. In the 1930s. It has uniform light tarnish, and has no rust, pitting or personal marks. Fine.