Description:Self-tapping inserts do not need to be tapped in; advance. They can be screwed directly into the special holes reserved by the base material to using an economical and aesthetically pleasing installation tool. They can also increase thread strength for new products, which are used throughout the entire ;metal and plastics processing industry. Features:Due to the ability to self-tapping, the base material should not be tapped. to advance. It has a large contact surface with the finished product, a strong resistance to tensile strength.Strong vibration resistance which can prevent loosening. There is no play with the base material and this one also has good sealing to the air if it contains bubbles. install - only need one assembly tool. Features: Material: SUS303, SUS316, carbon steelQuantity: 50pcsWeight: approx.192gPackage includes:10 x M3*0.5 thread insert10 x M4 thread insert*0.710 x M5 thread insert*0.85 x M6 thread insert*1.05 x M8 thread insert*1.255 x M10 thread insert*1.55 x M12 thread insert*1.75