No.1 Lengths in either inches or millimeters can be measured with the appropriate line. Maximum: 0.6" or 16mm.
No.2 Lengths can be measured in 0.1 millimeters increments. Maximum: 16mm.
No.3 Angles, radius, diameters,widths, etc. can be measured mainly in inches.
No.4 Angles, radius, diameters,etc. can be measured mainly in millimeters.