The Mahr Federal 16 EWR-NA, 4103074 Digital Keyseat Caliper has a measuring range of 0-6"/ 150mm. Includes a Round Depth Rod. It is equipped with IP67 Protection Class, which makes it waterproof as well as resistant against dust, coolants and lubricants. This is a Special Design caliper due to the Carbide outside measuring faces. Other features include a Reference Lock, On/Off Reset, to set the display to zero in either millimeters or inches and immediate measurement due to the Reference System. It also includes MarConnect data Output, giving the user the option to choose alternatively between USB, OPTO RS232C or Digimatic, Dirt wipers are integrated in the slide, Battery life lasts up to 3 years and contains a High contrast LCD screen with 8.5mm high digits. The slide and beam are constructed of hardened stainless steel, has measuring blades for inside measurements and a locking screw.