Premium material: The Starlock fitting rings are made of 65 manganese steel material with smooth edges, which is corrosion-resistant, high and low temperature resistant and durable for long-term use. Easy to useThe quick-run clamping washers exert a spring force between the mounting head and the substrate, which keeps the washer firmly fixed and creates more friction and rotation resistance. Easy to store: All snap rings in the circlip assortment are packed in a sturdy transparent plastic case, which is easy to use, find and transport and can also be used as a storage box. What you getYou will receive 340 pieces locking washers in sizes M3, M4, M5, M6, M8, M10, M12, suitable for different sizes of fasteners, enough for your daily use. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.