M4 304 Stainless Steel Button Head Torx Screws
Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Torx drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess. For Torx tools, see Torx bits, keys, and drivers. Length is measured from under the head.