Self Drilling Screw 1-1/4\ X 10 Hex Head Zinc Plated Alam Fasteners Made In Taiwan (1Box X 450 Pcs)Alam Fasteners Hex Head Drill Point Screw used for secure fastening and strong holding power. Provide secure metal-to-metal fastening and strong holding power without the need to pre-drill. Screws are designed to advance when turned, creating their own threads in the material. Engineered drill point and flute allow for efficient material removal. Excellent corrosion resistance.They are often used in sheet metal and plastic.Hex head fasteners can also be driven with simple wrenches, and require minimal clearance above the fastener because they can be driven or loosened from the side.