Accessbuy Small Flat and Lock Washer 1/4 3/8 5/16 3/16 Flat Washer Assortment Stainless Steel 250 Pieces Stainless steel with rust resistant galvanized finish to ensure life-time use Flat washers are commonly used in decks and fence building;These quality Lock & Flat washers assortment for home, automotive, and shop use. With a storing case to preserve tools without risk of loss and damage Material:metal;Withhold this great nice set, you do not have to stop in the middle of a project and run to the hardware store; Package include:Lock#5=90pcs#6=32pcs#8=18pcs#10=12pcs; Flat#5=50pcs#6=24pcs#8=15pcs#10=9pcs