This Fiknonk kit provides 200 durable copper crush washers, essential for creating reliable seals in automotive and mechanical applications. The soft copper deforms under pressure to fill microscopic gaps.

The primary function is sealing oil drain plugs. The washer compresses when the bolt is tightened, preventing oil leaks from the oil pan and ensuring a clean workspace after maintenance.

Organized in a clear plastic case with nine separate compartments, this kit makes finding the correct size (M5, M6, M8, M10, M12, M14) quick and easy, saving valuable time during repairs.

These washers also serve as effective seals for vibration-prone connections like fuel lines, coolant hoses, and hydraulic components, helping to reduce wear and prevent fluid leakage.

An ideal addition to any toolbox, this universal assortment is suitable for professionals and DIY enthusiasts working on most vehicles, including cars, trucks, SUVs, and motorcycles.