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This comprehensive 555-piece cotter pin assortment delivers the fastening solutions you need for machinery, automotive, and equipment maintenance. Featuring multiple sizes and gauges, this collection covers standard applications across industrial and DIY projects. Cotter pins secure critical components by passing through aligned holes and spreading the ends to prevent loosening from vibration or movement. Organized for easy selection, this assortment eliminates repeated trips to the supplier and ensures you have the right pin on hand. Ideal for mechanics, maintenance professionals, and workshop owners who demand reliability and variety in their fastening inventory.