MULTIPLE SIZE: 450 PCS stainless steel self tapping screw in 18 size 2 type head: Round Head Cross Sel Drilling Self Tapping Screws( #8x1/2” 45Pcs, #8x5/8” 35Pcs, #8x3/4” 35Pcs, #8x1” 20Pcs, #8x1-1/4” 15Pcs, #8x1-1/2” 10Pcs, #8x2” 10Pcs). Extemal Hexagon Self Tapping Screws(#8x1/2” 45Pcs, #8x5/8” 40Pcs, #8x3/4” 30Pcs, #8x1” 20Pcs, #8x1-1/4” 15Pcs, #8x1-1/2” 10Pcs, #10x1/2” 30Pcs, #10x5/8” 30Pcs, #10x3/4” 25Pcs, #10*1” 20Pcs, #10x1-1/4” 15PcsUPGRADED 304 STAINLESS STEEL: Our self tapping screws for metal are built with high grade410 stainless steel, which can easily penetrate into metal sheets.It has higher hardness, better stability and durability compared to traditional 304 stainless steel, A wide range of applications in everyday life can be handled with ease, such as construction, metal, wood and plasticWIDE APPLICATION: Hex washer/phillips round head, two different head types, the number are also based on the frequency of use planning, to ensure that there is no waste, the use of a wider range of more accuratePREPAREDNESS AVERTS PERIL: Self-drilling screws can be widely used in home, work, DIY, furniture and home appliance repair, commonly used in metal and wood, metal to metal fastening, suitable for electronic products, household appliances, fixed partsGOOBETTER: We pay great attention to the reputation of our brand Goobetter, so our product quality control sells very strict, packaging using environmentally friendly reusable materials, storage does not take up space