Details: * fresh and excessive quality.*Material: carbon steel*Color: Black*Size: M8X18mm (As photo show)*High power and hardness.*Not easy to rust.*Convenient to use.Package Contents:5*ScrewNote:1.The genuine coloration of the object may be slightly different from the pictures proven on web page caused by many factors resembling brightness of your computer screen and light brightness.2.Please enable slight handbook size deviation for the data.