1、CORROSION RESISTANT MATERIAL: Adopt good quality 410 stainless steel material, possess high strength, good corrosion resistance, make the fasteners durable 2、QUICKLY AND EASILY DRILL: This round head washer quick self tapping screw set contains 100pcs cross head with flared to meet your daily needs, the material is strong and not slippery, can be drilled quickly and easily, easy to use 3、NON BREAK OR DEFORM: Exquisite craftsmanship makes cross groove non slip, fast, not easy to break, possess high strength, not easy to deform, not eccentric 4、CLEAR THREADS: The cross section of the screw is smooth and free of burrs, the threads are clear and neat without gaps, which is conducive to tightening 5、FOR IMPROVEMENT APPLICATIONS: Self tapping screws are perfect for your home improvement, office or industrial workplace for indoor and outdoor applications