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 percent Brand NewMaterial: Carbon SteelWeight: Approx. 9-229g or 0.3-8.1ozLength: Approx. Inner M2x0.4 Outer M4.5x0.5: 6mm or 0.2inInner M4x0.7 Outer M6.5x0.75: 8mm or 0.3inInner M3x0.5 Outer M5x0.5: 6mm or 0.2inInner M5x0.8 Outer M8x1.0: 10mm or 0.4inInner M6x1.0 Outer M9x1.0: 12mm or 0.5inInner M6x1.0 Outer M10x1.5: 14mm or 0.6inInner M8x1.25 Outer M12x1.5: 15mm or 0.6inInner M10x1.5 Outer M14x1.5: 18mm or 0.7inInner M12x1.75 Outer M16x1.5: 22mm or 0.9inPackage List:20Pcs Thread Inserts.