Fowler 54-100-112-1 Stainless Steel Frame Economy Digital Caliper, 0-12" Measuring Range, 0.125" Jaw Thickness, 2.40" External Jaw Length, 0.930" Internal Jaw Length Resolution of 0.0005"/0.01mm for precise measurements Hardened stainless steel frame for corrosion resistance and long life Digital, single-value readout LCD shows inch and metric units for versatility when measuring Zero setting to take intermediate or differential measurements Knurled lock screw holds the sliding jaw in position and helps ensure a consistent measurement