The Hyper Tough Digital Caliper is a great tool for measuring outside, inside, depths and step. This tool features nylon construction for lasting durability, an LCD screen for easy measurement reading and push button conversion from inches to millimeters. This Digital Caliper features an auto shut-off to preserve battery life. Hyper Tough features a full line of hand tools, rotary tools, power tools, tool accessories, and tool storage. When you're ready to make repairs or tackle home-improvement projects, Hyper Tough is ready.