Our adjustable dumbbells are guaranteed for 1 year and include breakage of parts due to manufacturing defects. The warranty does not include failures caused by wear and tear caused by use. In any case, at BullGear we have a large stock of spare parts in our warehouses in Spain and we can supply spare parts within 24 hours. In case you have a problem with our dumbbells, do not hesitate to contact us at firstname.lastname@example.org. We will find the best solution for all parties.