The Precision Vernier Caliper is one of the finest calipers in the General line, made to exacting tolerances for guaranteed accuracy up to .001 . The extended vernier scale allows for easy and precise readings, and is etched with permanent black graduations. The Precision Vernier Caliper is made of hardened stainless steel with a satin chrome finish, and also features an extendable depth gage for use in slots and small holes.