Dasqua 0-3" depth micrometer. Accuracy is plus/minus 0.00025". Strictly made in accordance with DIN863. Dasqua depth micrometer measures depth of holes or parts with grooved or elevated surfaces. Satin chrome finish. Ratchet thimble, threads are hardened ground and lapped for consistent repeatability and accuracy. Positive locking clamp. Base surface hardened, ground and lapped. Measuring surface of rods are hardened, ground and lapped. Clear graduations easy-to-read. With fitted case.