Fowler Full Warranty Outside Inch Micrometer, 52-253-101-1, Ratchet Stop Thimble, 0-1" Measuring Range, 0.00016" Accuracy, 0.001" Graduation Full 1 year warranty offered by Fowler High Precision, an American company Outside micrometer with choice of measuring range and flat anvil/spindle pair for general purpose measuring Vernier scale has microfine 0.001" graduations and accuracy of 0.00016" for precise readings Hardened, precision-ground, and carbide-tipped anvil and spindle have 0.256" measuring faces with micro-lapped finish, 0.00003" flatness and .00008 parallelism for accurate measurements Ratchet stop thimble provides exact and repetitive readings, satin chrome finish on thimble and sleeve helps resist rust and reduce glare