Fowler’s Vernier Depth Gage is an extremely useful tool for measuring the depths of holes, slots and recesses. It features an extra wide base for proper contact. Highly accurate for use in tool rooms and inspection departments, on jigs, die works or fixtures. Designed for measuring depth of holes, slots and recesses. . Made of hardened stainless steel. Microfine black graduations on satin chrome finish for easy readability. The base is hardened, ground and microlapped. Positive locking set screw. Includes fitted case.