Details: * brand new and high quality.*Material: carbon steel*Color: Black*Size: M8X18mm (As photo show)*High power and hardness.*Not smooth to rust.*Convenient to use.Package Contents:5*ScrewNote:1.The real shade of the article could also be slightly diverse from the photographs proven on web page attributable to many factors corresponding to brightness of your computer screen and light-weight brightness.2.Please enable slight manual dimension deviation for the data.