Fowler Full Warranty Outside Inch Micrometer, 52-240-003-1, Ratchet Stop Thimble, 2-3" Measuring Range, 0.0001" Graduation Outside micrometer with choice of measuring range and flat anvil/spindle pair for general purpose measuring Vernier scale has microfine 0.0001" graduations and accuracy of 0.0001" 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 0.00005" parallelism for accurate measurements Friction or ratchet-stop thimble provide exact and repetitive readings Satin chrome finish on thimble and sleeve helps resist rust and reduce glare;1 year full warranty offered by Fowler High Precision, an American company