The EC799A-6/150 is a 6-inch Electronic Slide Digital Caliper, made of hardened stainless steel, with 0.0005-inch resolution. This caliper features lightweight, comfortable, easy-to-use and ergonomic design. Easy access to the single, long-life battery. Last measuring position retained when shut off. Hardened stainless steel body for long life. Fine adjustment thumb wheel. Lock screw to hold the slide in position. Linear accuracy meets DIN862.