50Pcs Self Tapping Thread Insert, 302 Stainless Steel Self Tapping Slotted Thread Inserts Set with Storage Case, M3 M4 M5 M6 M8 M10 M12 Thread Reinforce Repair Tool (Gold). Stainless Steel Material: These self -tapping thread inserts all made of high quality stainless steel, it is of high hardness and low abrasion.
