This small B&S surface gage features as spindle just 4 inches long and a base that measures 2 ¼ x 1 ½ inches. The stylus is good. The base has a V-groove for working on cylindrical surfaces. The body has two gage pins that allow it to be positioned against the edge of a surface plate or in a T-slot. This is the unhardened model. Needing only a light cleaning, it is fine.