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Geo Fennel Optical Square F1M


$297.00 inc GST

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The Geo Fennel optical square offers the highest accuracy and double pentagonal prisms for right angle sighting in either direction. A protective metal cover slides around to protect the prisms. The ideal builders square. Hard carry case included.


  • High Accuracy of <1'
  • Large clear prisms accurately turn line of sight at exactly 90°
  • Prisms are silvered on top and bottom for viewing +/- 45° above or below the position of the operator
  • Smooth operating rotating closure to protect prisms


  • Placing points on line
  • Setting out curves
  • Offset measurements
  • Determining the horizontal
  • Detail plans and area measurement
  • Simple height measurements 





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