An umbon is an iron plate with a round or conical shape. It is attached to the place of the hole for the hand, protecting it. Due to rounded shapes, the force of the impact is smoothed out, leading the impact away. Also, the umbon serves as a convex point on the shield, which can be used to strike the enemy with the shield. The umbon is attached to the shield with rivets or nails.
Shield boss forged on Cold, which increases its strength characteristics due to "work hardening" of metals.
How to keep
Do not allow moisture to enter, wipe with a dry cloth.