Transmutation
Level: Adept 0, Avenger 1, Bard 0, Cleric 0, Druid 0, Magewright 0, Mystic Ranger 0, Sorcerer 0, Urban Druid 0, Witch 0, Wizard 0
Components: V, S
Casting Time: 1 standard action
Range: 10 feet
Target: One object of up to 1 lb.
Duration: Instantaneous
Saving Throw: Will negates (harmless, object)
Spell Resistance: Yes (harmless, object)
Mending repairs small breaks or tears in objects (but not warps, such as might be caused by a warp wood spell). It will weld broken metallic objects such as a ring, a chain link, a medallion or a slender dagger, providing but one break exists. Ceramic or wooden objects with multiple breaks can be invisibly rejoined to be as strong as new. A hole in a leather sack or a wineskin is completely healed over by mending. The spell can repair a magic item, but the item’s magical abilities are not restored. The spell cannot mend broken magic rods, staffs, or wands, nor does it affect creatures (including constructs).
Source: Player’s Handbook (Page 253)