This set contains a wide assortment of lock washers, external washers and internal washers in one convenient kit! Suitable for both home and shop use, these lock washers feature a bright zinc-plated finish to resist rust and corrosion. The lock washers come organized in a resealable, divided PVC case with an index chart for easy, quick identification. Features internal and external lock washers zinc-plated steel for rust resistance poly storage container with snap-lock lid Specifications M3 lock: 50 x M4 lock: 50 x M5 lock: 50 x M6 lock: 40 x M8 lock: 30 x M10 lock: 20 x M3 external: 50 x M4 external: 50 x M5 external: 50 x M6 external: 40 x M8 external: 30 x M10 external: 20 x M3 internal: 50 x M4 internal: 50 x M5 internal: 50 x M6 internal: 40 x M8 internal: 30 x M10 internal: 20 x https://elecena.pl/product/18998281/has03-lock-washer-assortment-720-pcs 2021-07-05 https://elecena.pl/product/18998281/has03-lock-washer-assortment-720-pcs 2021-11-20 https://elecena.pl/product/18998281/has03-lock-washer-assortment-720-pcs 2022-05-21 https://elecena.pl/product/18998281/has03-lock-washer-assortment-720-pcs 2023-07-13