■Features
1. The face of prism staff can be used as prism
2. Good for forestry surveying
3. Stainless bottom part

■Features
1. Designed to measure a depth of drain
2. The arm part can be adjusted to fit to diameter of a manhole between 150-450mm
3. 50cm arm is standard accessory
4. Can be used as regular staff with adapter SWG-ADP

■Features
1. Simple but all uses
2. Suitable for measuring inside dimention
3. 10/33mm scale on the reverse (MTR-33)