Of stainless steel with parallax free reading through counter thrusting vernier.

* fine adjustment by gear wheel and gearing
* Each protractor in box.
* magnifyer for better reading of vernier,
* graduation in 4 x 90 degree on ground plate,
* 12ths degree = 5 min. on vernier

Each protractor in box.

Typ 853-Size 1

Length of blade: 150mm

Typ 853-Size 2

Length of blade: 200mm

Typ 853-Size 3

Length of blade: 300mm

Typ 853-Size 4

Length of blade: 500mm

Typ 853a

Spare blade stainless steel not hardened

Typ 853Ha

Spare blade stainless steel hardened