Fowler 54-004-877 X-Proof Water Resistant Electronic Measuring Set, 0-6" Electronic Caliper and 0-1" Electronic Micrometer Slide caliper measures 0 to 6"/0-150mm with 0.001"/0.02mm accuracy, and 0.0005"/0.01mm resolution for precise measurements Hardened stainless steel caliper frame for corrosion resistance and long life Digital, single-value readout LCD shows inch and metric units for versatility when measuring Outside micrometer with LCD measures 0 to 1"/25mm with 0.00016"/0.004mm accuracy and 0.0005"/0.01mm resolution for precise measurements Certified to IP 54 level of protection against dust and splashing liquid