Most multitool manufacturers have a warranty policy for their products (all of the products reviewed in this article are under guarantee for at least 25 years). For more information, you should visit the manufacturer’s website, especially those of “big players” in the industry, like Leatherman or Gerber. They will have a warranty section on their websites which supports customers in terms of finding out if their products are under guarantee and how to properly repair, exchange, or maintain their multitools.