Items can come under attack or be subjected to damage from the environment. Each item, whether it is a weapon, armor, a keystone, or your adventuring gear, has a durability. This number represents the total number of damage the item can take before it breaks.

If the final blow to an item was critical damage, the item shatters.

Items that are damaged can be repaired by their respective crafting profession or skill, as shown below. Repairing an item requires 20 minutes of work for each point of damage you wish to repair. You can attempt repairs in skills which you are untrained at a -10 penalty.

The difficulty check to repair damage depends on the highest level of damage severity done to the item, as shown below.