LOT OF 580 METAL WASHERS: This lot contains 580 metal washers. They are all made of solid and durable stainless steel. Each set contains 9 types of the most commonly used washers to meet all your needs. The size ranges from M2 to M12, with several of them being the same size, and their thickness varies from 0.3 mm to 2.2 mm. A plastic storage box with 9 compartments/sections is included to keep things organized. STEEL WASHERS IN 9 SIZES: This high-quality stainless steel washer assortment contains 9 different types of outer and inner diameters and thicknesses. M2: 4.9 x 2.1 x 0.3 mm; M2.5: 4.8 x 3.1 x 0.5 mm; M3: 6.9 x 3 x 0.4 mm; M4: 8.8 x 3.6 x 0.6 mm; M5: 9.5 x 4.8 x 0.8 mm; M6: 11 x 6 x 1.3 mm; M8: 15 x 8.2 x 1.1 mm; M10: 19 x 10 x 1.6 mm; and M12: 23 x 13 x 2.2 mm. All these types of metal seals are sorted by compartment. A size chart is included on the cover. SOLID STEEL: The surface of this type of hinge washer is smooth, so you won't hurt yourself during use. Stainless steel