Fowler Full 2 Year Warranty Xtra-Range Electronic Caliper, 54-100-024-1, 0-24" Measuring Range, 4" Jaw Depth, 0.0005" Resolution 2 year warranty offered by Fowler High Precision, an American company Extended measuring ranges of up to 24"/600mm, with 0.0005"/0.01mm resolution for inside dimension (ID) and outside dimension (OD) measurements Hardened stainless steel frame for corrosion resistance and long life, long jaws permit accessibility when measuring large workpieces Digital, single-value readout LCD shows inch and metric units for versatility when measuring Zero setting to take intermediate or differential measurements