Item Type: Self Drilling Screw Material: 410 Stainless steel Color: Silver Uses: Home and office appliances, fasteners in the workplace, electrical products, communications equipment, marine assembly, machinery, furniture, repair work, DIY crafts 1CORROSION RESISTANT 410 STAINLESS STEEL: The self drilling screw is made of 410 stainless steel, which is rust proof, has good corrosion resistance in harsh environments, and durable 2NON DEFORM OR SLIDE: The thread is of sharpness, clean and accurate, the thread is compact and powerful, and not easy to deform and slide during use 3STRONG TIGHTENING: The screw section is smooth without burrs, and the threads are clear and neat without gaps, which is conducive to tightening 4WIDE RANGE OF USES: Round head self drilling screws are widely used in household and office appliances, fasteners in the workplace, electrical products, communication equipment, ship assembly, machinery, furniture, repair work, DIY crafts 550PCS IN TOTAL: The package include a total of 50pcs self drilling screws, enough for you to replace and use, very convenient50 x Self Drilling Screw