The self-tapping thread insert is a kind of fastener that strengthens the thread, which can form a high-strength inner thread hole when embedded in a soft material such as plastic, copper.It can also be used to repair the damaged inner thread.Specification:Material: Stainless SteelQuantity: 50pcsColor: SilverPackage Weight: Approx. 192g/6.8ozPackage list:10 x M3*0.5-M5*0.5 L610 x M4*0.7-M6.5*0.75 L810 x M5*0.8-M8*1.0 L105 x M6*1.0-M10*1.5 L125 x M8*1.25-M12*1.5 L155 x M10*1.5-M14*1.5 L185 x M12*1.75-M16*1.5 L221 x Storage CaseNote:Due to the difference between monitors and light effect, the pictures may not reflect the actual color of the item.