This self drilling screw set is made of , which can withstand use. Features the stainless steel material, which has high durability, not easy to deform. Fine workmanship, practicality. Features -Color:Silver -Material:Stainless steel -Size:1.60X0.42X0.42cm,1.90X0.42X0.42cm,2.50X0.42X0.42cm/0.63X0.17X0.17in,0.75X0.17X0.17in,0.98X0.17X0.17in - Made of stainless steel, resistant against corrosion and rust-proof, and wear-resistant. - Can help you install curtain rods, towel rails, lamps, decorative paintings, mirrors, hang bathroom/kitchen accessories, etc. - Threads can easily penetrate wood and plastic, ensuring a firm hold while not easily deforming and sliding in use. - Mainly used for metal, plastic or board products, such as gypsum board, wood board, ceiling, clapboard, etc. - Widely used in electrical products, communication equipment, ship assembly, machinery, furniture, other maintenance work, DIY crafts. Package list: 35 x .2x16 screws 35 x .2x19 screws 35 x .2x25 screws