weideer 180pcs #8 Self Tapping Screws for Metal, #8×1/2″ – 1-1/4″, Black
Material: Self tapping screws are made of 410 stainless steel.Black oxide.Self-drilling screws have higher density, better stability, durability, corrosion resistance and wear resistance than ordinary screws.410 stainless steel is a new type of stainless steel with magnetic properties.