Suitable for: It can be used well in car and motorcycle maintenance work. If you need a general purpose lock washer, take the opportunity to hang them up. These washers can keep what you are building or fixing nice and don't end up with a scratched surface. High quality stainless steel: The high-quality stainless steel makes the elasticity of the washers ideal, and the texture has just the right amount of rigidity while still being sturdy. Total 70pcs washers, practical and economical, fully meet your needs. < p>High performance: used to prevent loosening of nuts, bolts and screws. The lock washers are separated and bent at specific points to make them spiral. In many materials, these lock washers are pressed down, which adds extra pressure to the nut or bolt and the material. Spiral with slot: They look like washers that have been split in a certain way and angle. Producing elastic force by its spiral shape, the opening tip can prevent the nut and bolt from loosening. You don't need to keep them tightened from time to time. neat opening: it is a spring washer with a clean and neat opening, really prevents the nut from backing out! Once you secure it under a bolt, this allows that bolt to stay, the two opening tips can line up with each other without issue, no burrs to block the opening. luckymeet