Features:1. Made of high quality carobn steel, durable to use.2. Large contact area, it can bear strong tension. 3. Strong resistance to vibration which can prevent loosening. 4. Easy and convenient to install, quickly and simply. 5. Widely used in the automotive industry, rail vehicle industry, shipbuilding industry, household appliances, construction machinery, business machinery, electronic products, engineering plastics, advanced furniture, aluminum die-casting and other industries.6. Available in nine styles for your choice.Specification:Condition: 100% Brand NewMaterial: Carbon SteelWeight: Approx. 9-229g / 0.3-8.1ozLength: Approx. Inner M2x0.4 Outer M4.5x0.5: 6mm / 0.2inInner M4x0.7 Outer M6.5x0.75: 8mm / 0.3inInner M3x0.5 Outer M5x0.5: 6mm / 0.2inInner M5x0.8 Outer M8x1.0: 10mm / 0.4inInner M6x1.0 Outer M9x1.0: 12mm / 0.5inInner M6x1.0 Outer M10x1.5: 14mm / 0.6inInner M8x1.25 Outer M12x1.5: 15mm / 0.6inInner M10x1.5 Outer M14x1.5: 18mm / 0.7inInner M12x1.75 Outer M16x1.5: 22mm / 0.9inPackage List:20Pcs Thread Inserts.