accurate digital height gauge with metal scriber on plane granite measuring surface plate

measuring height gauge tool marking granite plate table precision closeup surface aluminum sharp scriber gray aluminium profile metal mechanical engineering mark layout caliper needle carbide edge drawing groove scratch line measurement scale instrument equipment digital display transferring design accurate dimension distance size smooth plane accuracy quality workpiece machinebuilding industry technology technique technical process machining manufacturing working blur vertical scribing block measure holder device stone material perfect flat metallic iron industrial metalwork dimensions size