Geo Optical Square F1M

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 pouch included.

Features:

• 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

Applications: 

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