describe: one hundred pc fresh and effective feature: Made of nice materials, anti-rust, anti-corrosion, and durable. Fine workmanship, mushy surface and extensive application. The lines are neat and clear, and the force is even and not smooth to slip. The holes are soft with out burrs and won't hurt your hands. M4/M5/M6/M8/M10 models are available in to choose between to satisfy your diverse needs. Widely utilized in mechanical equipment, vast equipment, household tools, etc. Specification: Item type: Torx finger tightening nut Material: plastic + copper, plastic + iron Dimensions: M5: 32mm/1.2in, M6: 32mm/1.2in, M8: 38mm/1.4in, M10: 38mm/1.4in Colour: Black Optional type: M4/M5/M6/M8/M10(iron core) notes: Transition: 1cm=10mm=0.39inch Due to guide measurement, please allow an error of 0-5mm. Make sure you don't intellect before bidding Due to the diversities between varied monitors, the picture may not mirror the actual shade of the item. Thanks!