The Bike-It 100pc Nylon Locknut Assortment includes a selection of Locknuts which are zinc-plated to resist corrosion.Zinc-plated to resist corrosionNylon insert works as a lock washerWashers keep fasteners secure in high-vibration applicationsSelection of 6, 8, 10, 12mm in a plastic storage caseThe Bike-It 100pc Nylon Locknut Assortment has a Nylon insert which works as a lock washer, to keep the fasteners secure in a high-vibration applications. The locknuts are zinc-plated to resist corrosion, and the set includes a selection of 6, 8, 10, 12mm in a plastic storage case.