Features 304 Stainless Steel Material: M4.2x16 screws are made of excellent 304 stainless steel with high strength, which is rust and corrosion resistant and has a long service life. Compact Powerful Thread: The thread is clear and accurate, compact and powerful, and it is not easy to deform or slide during use, has good stability. Easy to Tighten: The cross section of these screws is glossy without burrs, neat and clear without gaps, which is conducive to fast tightening. 200pcs in All: There are 200pcs screw fastener in the set, and the large quantity will satisfy your varied work needs. Applicable Scenes: These 304 stainless steel round head self drilling screws are widely used in home and office appliances, fasteners in the workplace, electrical products, communication equipment, ship assembly, machinery, furniture, repair work, DIY crafts, etc. Specification: Item Type: Self Drilling Screw Material: 304 Stainless Steel Colour: Silver Application: Fasteners for home and office appliances, workplace, electrical products, communications equipment, marine assembly, machinery, furniture, repair work, DIY crafts.  Package List: 200 x Self Drilling Screw Package List 200 x Self Drilling Screw