Mitutoyo vernier calipers 5in130mm 6in150mm and 7in180mm mitutoyo 531 128 this vernier caliper with thumb lock 6in150mm from mitutoyo are high precision calipers which deliver accurate measurements making them ideal for internal and external distances equipped with a host of excellent features including the 14deg vernier face angle for easy reading on a satin chrome finish plus fine adjustment wheel with four basic measuring methods depth inside outside and step this particulr