The v-anvil micrometer is ideal for the specific measurements described – outside diameter of cutting tools with an odd number of flutes and part out-of-roundness. What makes the v-anvil micrometer such a specialized precision measurement tool is the shape of the anvil into a “V”. The shape of the anvil on the v-anvil micrometer allows for three points of contact as opposed to the two that are available when using another type of micrometer or caliper. These three points of contact include each side of the “V” as well as the spindle. The increase in contact points allows for more accurate and stable positioning of the part or tool being measured which increases the precision of the overall measurement. In fact, the v-anvil micrometer is the only precision measurement tool capable of completing these types of measurements with that level of accuracy.