Precision micrometer, Instrument used to measure thickness of a material .This screw gauge also called external micrometer, is typically used to measure wires, spheres, shafts and blocks. Tempered measuring spindle , solid brass body nickel-plated finish. 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 storage case.