Description:They are made of 410 stainless steel, which has higher hardness, corrosion resistance, and rust resistance.The self-drilling screws can drill well into wood, sheet metal, and other surfaces. The thread can reduce the resistance when screwing in and prevent cracking.It can also connect metal hardware to the wood well because the threaded rods provide good retention in the wood.Widely used in various manufacturing, construction, engineering, and assembly industries.Specification:Material: 410 Stainless SteelFinish: Black Zinc-PlatedThread Size: 1/4" x 1-1/4"Screw Head Thickness: 2.6mm / 0.1"Package Content:150pcs x Hex Socket Self Tapping Screws
