All metal simple practical metal compass

Two products:

full metal bronze compass, the product is simple and practical, easy to use, reliable quality, accuracy and good stability.

Method of use: hand or on the table flat, green arrow is the direction of the north, South to the counter.

size: maximum diameter: 5.1CM

The maximum length : 7.8CM

weight: about 106 grams of

use:
matters must be level with the compass needle, in order to avoid confusion, should keep a certain distance with barbed wire, high voltage wire, automobile and aircraft as well as containing magnetic objects, as follows: the reference index
from the barbed wire >
- 10 meters away from the power lines &gt 55 meters;
- from cars or airplanes > 20 meters away from the
containing strong magnetic objects, such as magnets, external magnetic horn > 10 meters away from the
weak magnetic objects such as magnetic snap button > 0.5 m -
organic glass lens and cover dirt, use white cloth or absorbent cotton wipe the surface, if necessary, use toothpaste to polish