The M3-0.5 x 10W7 JIS B1188 Phil Pan 304SS Split Washer 302/304SS Flat Washer Sems A2 Stainless is a high-quality fastener set designed for use in a variety of applications. The set includes 10 split washers and 10 flat washers, all made from durable 304 stainless steel. The split washers are designed to prevent loosening of the screws or bolts they are used with, while the flat washers help to distribute the load of the fastener. The set is corrosion-resistant and can be used in both indoor and outdoor applications.