The outer tooth lock washer is made of stainless steel, which is safe and , and can play an excellent fastening function to prevent loosening. Made with superb craftsmanship. It has and will not rust or be easily damaged. In addition to the good fastening effect, the washer can also play a certain buffering effect during the vibration process. This is a very useful widget. Features -Color: Silver. -Material: Stainless Steel. -Size: About 2.00X2.00X0.10cm/0.79X0.79X0.04inch. -External serrated lock washers are mainly used for small parts, which can effectively prevent loosening. -It can be widely used in most types of machinery with good adaptability. -The scientific structure design can prevent the nut or bolt head from loosening due to the action of the . -Easy to store, and will serve you. -Made with craftsmanship, it is stable and practical, not easy to fall off or damage. Package list: 280 x serrated lock washers