Mitutoyo Digimatic Holtest Internal Micrometer Interchangeable Head Set 20-50mm

This is Mitutoyo digimatic holtest set includes one display unit with four interchangeable measuring heads. The unit uses three contact points to measure the inside of holes. Each contact point is evenly spaced and coated with Titanium nitride (TiN) to provide excellent durability. There is a ratchet-stop on the tool to provide constant force while measuring to ensure accuracy. The set comes in a wooden case.

• Measurement Range: 20 - 50 mm
• Head Ranges: 20 - 25 mm,  25- 30 mm, 30 - 40 mm, 40 - 50 mm
  
• Accuracy: ± 3 µm
• Resolution: 0.001 mm
  
• Measuring Depth: 93 - 103.8 mm (3.7" - 4.1")
  
• Weight: 1170 grams (2.6 lb)
• Included in set: one display unit, 4 measuring heads, 2 setting rings (Ø25 mm and Ø40 mm), key, 1 battery, box for storage, extension rod

MItutoyo part # 468-973

NOTE: This item is not returnable.