The most important possession any warrior has, is his sword, or axe, or whatever weapon he uses. A warrior's weapon is as important to him as a spellbook is to a mage. Over time a weapon may gather knicks, and scratches, and those can turn into cracks and chips. If these are not taken care of on a regular basis, the weapon could break under the stress of normal use. It is a good practice to regularly have one's weapon checked and repaired in order to keep it on tip-top shape.