Features: - Package contents: Includes 100 flat washers in 5 different sizes. Comes in a transparent plastic case with compartments for easy daily use. - Easy to use: Lightweight and portable, select the appropriate diameter for your needs and install them manually. - Durable material: Made of high-quality stainless steel, durable and corrosion-resistant. - Practical helper: Increase the contact area of the surface, prevent loosening and leaks, and protect the parts. - Wide application: Suitable for maintenance of parts and mechanical equipment at home and workplace, practical accessories for furniture, plumbers, crafts, and mechanics.