These are contractor grade 410 stainless steel Hex TEK 5 self drilling screws. drills up to 1/2" steel. Comes in packs of 50.
THIS IS A FERROUS STAINLESS GRADE SELF DRILLING SCREW. THERE ARE ELEMENTS ADDED TO MAINTAIN HARDNESS AND SELF DRILLING ATTRIBUTES OF THE SCREW. IT DOES HAVE SOME MAGNETIC PROPERTIES.