Features: 1. Made of high quality carob steel, durable to use. 2. Large contact area, can withstand strong tension. 3. Strong vibration resistance which can prevent loosening. 4. Easy and convenient to install, quick and easy. 5. Widely used in automotive industry, rail vehicle industry, shipbuilding industry, home appliances, construction machinery, commercial 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 New Material: Carbon Steel Optional Style: Inner M2x0.4 Outer M4.5x0.5, Inner M4x0.7 Outer M6.5x0.75, Inner M3x0.5 Outer M5x0.5, Inner M5x0. .8 Outer M8x1.0, Inner M6x1.0 Outer M9x1.0, Inner M6x1.0 Outer M10x1.5, Inner M8x1.25 Outer M12x1.5, Inner M10x1.5 Outer M14x1.5, Inner M12x1.75 Outer M16x1. 5 Weight: Approx. 9-229g/0.3-8.1oz Length: Approx. Inner M2x0.4 Outer M4.5x0.5: 6mm/0.2in Inner M4x0.7 Outer M6.5x0.75: 8mm/0.3in Inner M3x0.5 Outer M5x0.5: 6mm/0.2in Inner M5x0.8 Outer M8x1. 0: 10mm / 0.4in Inner M6x1.0 Outer M9x1.0: 12mm / 0.5in Inner M6x1.0 Outer M10x1.5: 14mm / 0.6in Inner M8x1.25 Outer M12x1.5: 15mm / 0.6in Inner M10x1.5 Outer M14x1.5: 18mm / 0.7in Inner M12x1.75 Outer M16x1.5: 22mm / 0.9in Package List: 20 x Threaded Inserts 1. Made of high quality carbon steel, durable to use. 2. Large contact area, can withstand strong tension. 3. Strong vibration resistance which can prevent loosening. 4. Easy and convenient to install, quickly and easily. 5. Widely used in automotive industry, railway vehicle industry, shipbuilding industry, household appliances, construction machinery, commercial machinery, electronic products, engineering plastics, advanced furniture, aluminum die-casting and other industries.