LOT OF 580 METAL WASHERS: This lot contains 580 metal washers. They are all made of strong and durable stainless steel. Each set includes 9 kinds of most commonly used flat washers to meet all your needs. The size of these ranges from M2-M12 with several of the same size and their thickness varies between 0.3 mm and 2.2 mm. A plastic storage box is included with 9 compartments/sections to stay organized. 9 STEEL WASHER SIZES: This high quality stainless steel washer assortment contains 9 kinds of different external, internal diameter and thickness. SOLID STEEL: The surface of this type of hinge washer is smooth, preventing you from hurting yourself when using it. Stainless steel is sturdy, strong and durable and won't break easily. It is also anti-rust and anti-erosion. Use this type of shim washer to distribute the pressure of fasteners like bolts and screws to protect the surfaces of the assembly parts. They also reduce friction, prevent leaks and won't loosen. MULTIPURPOSE: When not in use, store these flat washers in your box, lying on your shelf, in your toolbox or in a drawer. This set can be used at home, in a shed or at work. Belle Vous Stainless Steel Washer with Storage Box (Pack of 580). This type of washer is made of stainless steel which is strong and durable. Each stainless steel washer assortment contains the 9 most used types to meet all your needs. Their size varies between M2-M12 with several for each size.When not in use, store them in their box, which can be stored on a shelf, in a tool box or in a drawer. Included: 100 x M2. 100 x M2.5. 100 x M3. 100 x M4. 60 x M5. 40 x M6. 50 x M8. 20 x M10. 10 x M12.