General description Starlock Washer Set includes 680 pieces in various sizes (M3, M4, M5, M6, M8, M10, M12) to meet your daily needs. Made from high-quality 65Mn metal steel, these washers are extremely strong, corrosion-resistant, and durable. The set is ideal for a wide range of applications, including mechanical equipment, electronic devices, and household appliances, making it suitable for craftsmen, professionals, and artisans. Technical specifications Material: 65Mn metal steel Sizes included: M3, M4, M5, M6, M8, M10, M12 Total pieces: 680 Usage The locking washer applies a spring force between the head and the base plate, fixing the hard washer to the thread of the hard bolt in front of the base plate. This design increases friction and rotation resistance, ensuring a secure fit. Other information Each size is organized in a storage box for easy access and storage.