About this item

• [A Kit] You& #39;ll get 400pcs external and internal star washers, including 40pcs M2.5 external, 40pcs M3 external, 30pcs M4 external, 30pcs M5 external, 20pcs M6 external, 20pcs M8 external, 10pcs M10 external, 10pcs M12 external, 40pcs M2 internal , 40pcs M3 internal, 30pcs M4 internal, 30pcs M5 internal, 20pcs M6 internal, 20pcs M8 internal, 10pcs M10 internal, 10pcs M12 internal.
• [B Kit] You'll get 300pcs internal star tooth lock, including 50pcs M2, 50pcs M3, 50pcs M4, 40pcs M5, 40pcs M6, 30pcs M8, 20pcs M10, 20pcs M12.
• [High-quality Material] Made of 304 Stainless Steel Material, Very Good Corrosion Resistance, It Can Be Used in a Humid Environment.
• [✔] A Lock washer exerts a spring force between the fasteners head and the substrate, which maintains the washer hard against the substrate and the bolt thread hard against the nut or substrate thread, creating more friction and resistance to rotation.