Specifications:Material: 304 stainless steelModel: Cup Head Hex SocketWeight: 184gSize and Quantity:M3*8 30PCSM3*6 30PCSM3*12 30PCSM3*16 30PCSM3*20 30PCSM3 Nuts 60PCS Features: Designed with 304 stainless steel material, providing strength and offers good corrosion resistance in many environments. Fixing component, for industrial and construction fasteners. Widely used in energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, mold, hydraulic, and so on. This item kit includes M3 hex socket screw bolts and hex nuts, is a ideal combination. This bolts screws and nuts come with a plastic box, so is convenient to storage.