Vernier Digital Caliper For Precise Measurements. This is a new vernier digital caliper. Great for precise measurements. Made of stainless steel. Includes battery. Has a locking screw to hold the measurement in place. The wheel helps slide the gauge for ease of use. Measures in inches and millimeters. The jaws measure inside and outside lengths and it has a depth gauge on the end. Has a conversion chart on the back of the caliper. It measures up to 4" or 100 mm. Graduated in 1 mm and 1/10" increments. This caliper measures approximately 6 1/2" (231.7 mm) long. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.