General description This set includes 580 metal washers made of solid and durable stainless steel. It features 9 commonly used types of flat washers to meet all your needs, ranging in size from M2 to M12, with varying thicknesses between 0.3 mm and 2.2 mm. A plastic storage box with 9 compartments is included to keep everything organized. Technical specifications 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 M12: 23 x 13 x 2.2 mm Usage These washers are designed to distribute the pressure of fastening elements such as bolts and screws, protecting the surfaces of assembly parts. They also reduce friction, prevent leaks, and do not loosen easily. When not in use, store these flat washers in the provided box, on a shelf, in your toolbox, or in a drawer. This set can be used at home, in a shed, or at work for various projects including building decks,