Features Premium Quality Materials: Crafted from 65# manganese steel, these washers provide exceptional durability and strength for reliable fastening in various applications Versatile Size Selection: This set includes 260 pieces in multiple sizes (3/4/5/6/8/10/12mm), ensuring you have the right washer for any project or repair need Long-lasting Supply: With a total of 260 lock washers included, you can tackle numerous tasks without the worry of running out, making it a cost-effective choice Organized Storage Solution: All washers are neatly packed in a durable plastic box, allowing for easy access and organization, so you can quickly find the size you need Reliable Performance: Designed for optimal retention, these push-on washers enhance the performance of your fasteners by providing a secure fit and reducing the risk of loosening Features: 1、100% and . 2、Made of 65# manganese steel, these lock washers are and sturdy. 3、This set contains many different sizes of washers to meet various need. 4、There are total 260 lock washer that you may use for a long time. 5、All washers are well packed and assorted in a plastic box for convenient storage. Specification: Features: 100% and . Made of 65# manganese steel, these lock washers are and sturdy. This set contains many different sizes of washers to meet various need. There are total 260 lock washer that you may use for a long time. All washers are well packed and assorted in a plastic box for convenient storage. Specification: Material: 65# manganese steel Finishing: Blackening Size(inner dia.*outer dia.*thickness)& Quantity: 3*9*0.25mm 30pcs 4*12*0.25mm 30pcs 5*12*0.25mm 40pcs 6*16*0.25mm 50pcs 8*17.5*0.25mm 50pcs 10*20*0.25mm 40pcs 12*25*0.25mm 20pcs Weight: 169g / 6oz (approx.) Package list: 1 box * Lock Washers Package List