IP54 Waterproof & Stainless Steel Material: Stainless steel digital caliper with IP54 grade protection, sturdy frame and a lockable head, which can resist water, dust, oil, and rust. The shell is made of metal with silver painted to prevent corrosion, allowing you to slide calipers smoothly! It is very suitable for engineers, carpenters, households, professionals, etc.
ZERO Setting & Auto Shut Off & LCD Thumb roller and slider clamp screw enables a high accuracy. You can also reset it to zero with the "zero" button for measuring the next section. If there is no operation within few minutes, the digital caliper will automatically shut down and the LCD display will turn off to save power. And when the thumb wheel moves, the display screen restores power. 3 batteries are provided: one installed and other two as spare batteries.