This Syneco 480 Piece Assorted Nuts and Bolts Set includes a variety of hexagon bolts,nuts and split washers in popular sizes to handle a wide variety of projects. Assortments are often used for maintenance, repairs, projects and manufacturing. They are great for home, office or business use. The set comes in storage case with separate compartments for quick access and easy portability so you'll always have the right nut or bolt for the job. This set includes: 160 piece Hexagon Bolt: 40 piece M6x16 30 piece M6x20 30 piece M6x25 15 piece M8x20 15 piece M8x25 15 piece M8x30 15 piece M8x40 160 piece Washer: 100 piece M6 60 piece M8 160 piece Nut: 100 piece M6 60 piece M8