Features: 1. Made of high quality stainless 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% New Material: Stainless Steel Optional Style: Inner M3*0.5 Outer M5*0.6, Inner M4*0.7 Outer M6.5*0.8, Inner M5*0.8 Outer M8*1.0, Inner M6*1.0Outer M10*1.25, Inner M8*1.25 Outer M12*1.5, Inner M10*1.5 OuterM14*1.5, Inner M12*1.75 Outer M16*1.75, Inner M14*2.0 Outer M18*2.0, Inner M16*2.0 Outer M20*2.0 Weight: Approx. 4-100g / 0.1-3.5oz Length: Approx. Inner M3*0.5 Outer M5*0.6: 4mm / 0.2in Inner M4*0.7 Outer M6.5*0.8: 6mm / 0.2in Inner M5*0.8 Outer M8*1.0: 7mm / 0.3in Inner M6*1.0Outer M10*1.25: 8mm / 0.3in Inner M8*1.25 Outer M12*1.5: 9mm / 0.4in Inner M10*1.5 OuterM14*1.5: 10mm / 0.4in Inner M12*1.75 Outer M16*1.75: 12mm / 0.5in Inner M14*2.0 Outer M18*2.0: 14mm / 0.6in Inner M16*2.0 Outer M20*2.0: 14mm / 0.6in Package List: 10Pcs Thread Inserts