Features 1、100% brand new and high quality. 2、Made of premium 65Mn steel, these lock washers are sturdy and durable. 3、There are total 10 pieces of washer in one set that you may use for many projects. 4、Widely used as fasteners for machinery and industry. 5、They are great accessories to replace your old or broken ones. Specification Features: 100% brand new and high quality. Made of premium 65Mn steel, these lock washers are sturdy and durable. There are total 10 pieces of washer in one set that you may use for many projects. Widely used as fasteners for machinery and industry. They are great accessories to replace your old or broken ones. Specification: Material: 65 Mn steel Quantity: 10pcs Weight: 10 ~ 22 g / 0.4 ~ 0.8 oz(approx.) Package list: 1 set * Washers Package List