Specifications include... 0-60" Measuring Range 0.001" Graduations 0.35" Internal Jaw Width 7" Jaw Depth Mitutoyo's Vernier Calipers with Nib Style Jaws and Fine Adjustment offer the following features... The jaws have round measuring faces for accurate ID measurement. With fine adjustment carriage to feed the slider. Inside and outside measurements can be directly read from the upper and lower slider graduations, respectively.