For measurement of small outside diameter, thickness etc. Ideal for engineering and technical schools to teach the working of this instrument. Consists of a frame of solid brass body with a chrome satin finish and a hardened steel screw. Provided with a ratchet and a locknut for accurate readings. Zero adjustment is possible. Pitch of the screw is 0.5mm and the least count is 0.01mm. Packed in a plastic case.
Measuring range: 0-25mm