Holtest 3 Point Internal Micrometer - Series 368 Imperial Holtest sets

By M.T.I Qualos

Measurement Applications

With 3 equally spaced anvils accurate alignment within a bore ensures consistent diameter measurements.


  • 3 point contact (Self centering)
  • Contact Points are made of hardened alloyed steel
  • Can be fitted with extension rods for deeper holes
  • Boxed sets are also supplied with extension Rod (100 or 150mm), Spanner and Hex-Wrench
  • Clear graduations on satin chrome finish


6-20mm 2µm/0.0001 inches

20-100mm 3µm/0.00015 inches

100-300mm 5µm/0.0002 inches