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