The strong magnet fitted to the sump plug traps the knife sharp, abrasive small ferrous particles and therefore reduces the overall wear of the engine. Helps analyze damage and detect possible wear earlier. Supplied complete with a new copper washer.
Note: It is recommended to change the copper washer whenever the plug is removed to avoid annoying oil leaks (also with original plug). So, whenever changing oil don't forget to order a new one. Available under the Related Products.