The Weiser Columbia Handleset (Less Interior Pack) comes with a limited lifetime mechanical and finish warranty. Here are the details: Lifetime Mechanical Warranty: This warranty covers all defects in material and workmanship. It ensures that the product functions properly due to faulty workmanship or materials. However, it excludes locks that have been damaged by installation contrary to written instructions or modified with non-Weiser components. Lifetime Finish Warranty: Effective from December 1, 2001, Weiser extends a lifetime finish warranty against corrosion, tarnishing, or discoloring on its products. This warranty excludes scratches or abrasions, misused or abused products, or products used in commercial applications. The term “commercial” refers to any application other than those found in private residences. Notably, the lifetime finish warranty applies to all Weiser products with a Brilliance® finish (Bright Brass, Bright Chrome, or Satin Chrome), regardless of the purchase or production date.