VISHAL Optical Square Right Angle Optical Ranger Full Aluminum Body Ring Gauge

An optical square is a hand instrument used by surveyor's to lay off right angles that are multiples of 90° or of 45°. They normally comprise of two optical glass mirrors in a sturdy Aluminum housing. Used for placing points on a line, offset measurements, setting our curves or determining horizontal plans. Optical Square is more accurate than the cross staff and it can be used for locating objects situated at larger distances. It is small and compact hand instrument and works on the principle of reflection. Generally it is a Aluminum triangular box about 5 cm length. It consists of horizontal mirror (H) and index mirror (1) placed at an angle of 45 degree to each other. Material Full Aluminum Casting Body Handle Aluminum Highly Powder Coated Colored 2 Mirrors Packing: - Elegantly Packed in Carrying Case Dimensions: - 10x5x5 cm Weight: - 100 gram