Description: 【Versatile】Includes 12 popular sizes (M3, M4, M5, M6, M8, M10, M12) to meet a wide range of bolt installation needs for various projects 【Comprehensive】135 piece set offers good value by providing all commonly used washer specifications in package—ideal for repairs, installations, and DIY tasks 【Enhanced Protection】Large outer diameter design effectively distributes force to prevent damage to workpiece surfaces and ensures stable connections 【Quality Metal】Made from high strength stainless steel for good wear resistance and deformation avoidance; suitable for long term use in demanding environments 【Organized】Conveniently sorted storage box with clearly labeled compartments makes it easy to find the right size quickly without confusion Specification: Material: Stainless Steel Size Chart: Box: 12.8cmx6.6cmx2.2cm/5.04inchx2.60inchx0.87inch Package Includes: 135 Stainless Steel Flat Washers Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.