Steel chrome plated model. One side graduated in inches for 6 inch and other side graduated in millimeters for 15 cm and the 10-part Vernierreadsto 0.1mm. The moveable jaw can be held at any position on the scale by means of a spring constant. Fine adjustment can be made by means of a convenient thumb-operated strip which is allowed to disengage for fast adjustment. least count of 0.001 cm. Supplied in a velvet case.