Product Features

• • These holtests are versatile, self-centering three point internal micrometers for the accurate and efficient direct measurement of internal diameters
  • Three anvils, evenly spaced at 120 deg apart, contact the internal wall surfaces and find true alignment with the axis of the bore for accurate ID measurement
  • Highly durable because of carbide tipped contact points (anvils)
  • Measurement can be taken closer to the bottom of the blind bore
  • With ratchet stop for constant force
  • Can measure deep holes using an extension rod
  • TiN coated measuring contact points provide excellent durability and impact resistance and allow the instrument to measure right to the bottom of a blind hole
  • Supplied in fitted plastic case