Digital ABS Borematic (Internal) Inch/Metric, 50.8-101.6/2-4", Interchangeable heads Set 568-936

This is a Three-Point Digimatic Snap Open Bore Gauge Set with one display unit and interchangeable heads.
It offers you the following benefits:

• It enables you to take measurements easily and quickly.
• Titanium-coated measuring pins gives you excellent durability and impact resistance.
• 330° rotatable display unit also gives you easy reading at any
  angle.
• GO/NG tolerance judgement function.