Premium MaterialThe clip washers are made of excellent stainless steel material with smooth edges, corrosion resistant, strong and durable for long time use. - loosening the lock washer plus the locking force of the nut itself, which creates greater resistance to friction and rotation for a stronger effect.Easy to store All lock washers are classified and stored in a transparent plastic case, which is very easy to store, find and store neatly.Wide range of applicationsSuitable for electrical connection of household and commercial appliances as well as for automotive and marine applications.What You GetYou get 50pcs m3, 50pcs m4, 50pcs m5, 40pcs m6, 40pcs m8, 20pcs m10, 20pcs m12, total 270pcs , which is sufficient for a ut daily use.