Dasqua 0-0.25" micrometer head is used for improving accuracy in machines, gauging, test equipment, electronics, optical instruments and machine instruments. Quick and easy adjustment. Flat, lapped face. High precision spindle. Easy to read. Satin chrome, low glare finish. Rust resistant. Ratchet thimble. Hardened ground and threads for consistent repeatability and accuracy. Accuracy is .0015".