Vernier caliper is a kind of precision measuring tools. It is used for mechanical processing measure & mechanical maintenance measure. It is four-way measurements which include outside measure, inside measure, depth measure & height measure for range 150mm or more. It is made of stainless steel or carbon steel. It can be three-way measurements which include outside measure, inside measure & depth measure according requirements. It is mono-block vernier caliper with four-way measurements. It is made of stainless steel or carbon steel. It is with fine adjustment for range 300mm or more. It has single metric system, single inch system and both of them.