Fowler 52-226-661 EZ-Read Digit Micrometer with 15-degree Point, 0-1" Measuring Range, 0.00016" Accuracy, 0.0001" Graduation Outside micrometer with 0 to 1" measuring range and choice of 15-degree or 60-degree point anvil/spindle pair measures small flutes, recesses, grooved wires, keyways and other hard-to-reach areas Digit display has 0.0001" graduation intervals and an accuracy of 0.00016" for precise readings Anvil and spindle are made from hardened, ground, and micro-lapped high-grade steel for accuracy, wear resistance, and long life Friction thimble provides smooth and quiet operation, and is suitable for one-handed operation Positive locking lever on the spindle locks measurements in place for accurate readings