1. Full Set: 9 sizes are included in this assortment kit of Washer, m2 120pcs, m2.5 120pcs, m3 150pcs, m4 150pcs, m5 130pcs, m6 50pcs m8 50pcs, m10 20pcs, m12 10pcs, total 800 pcs, sizes and quantities are so complete that you can keep it at home for emergency repairs.2. Material 304 Steel: Our DIY flat washer is made of high quality 304 stainless steel, the stainless steel is corrosion resistant, extremely strong, and will not break during use.3. Widely Application: Corrosion-resistant flat washer is perfect for electrical connections on household and commercial appliances, automotive and marine uses where the power source has a threaded / bolt-type connection.4. Function Of Small Washer: It is a component which closely connects machinery and equipment. Seals increase contact area, reduce pressure, prevent loosening, and protect parts and screws5. A Storage Box Offer: Attached washer assortment kit have neatly stored in a plastic box with compartments for you easily find the size you need and also for easy storage.