Fowler / Bowers Holemike The Fowler/Bowers range of mechanical two and three point bore micrometers are now available as XT extended travel holemikes allowing a wide measurement range without the need to interchange anvils. Feature Include... 2.000" - 2.625" Measuring Range Graduations: 0.00025 3-pt contact with tungsten carbide measuring anvils Ratchet stop for consistent measuring Non-removable anvils Extensions available for deep measuring SETTING RING INCLUDED Accuracy: .00015" Measuring Depth: 3.15"