Details: * brand new and excessive quality.*Material: carbon steel*Color: Black*Size: M8X18mm (As picture show)*High power and hardness.*Not easy to rust.*Convenient to use.Package Contents:5*ScrewNote:1.The real coloration of the item may be slightly varied from the images proven on web content attributable to many factors resembling brightness of your video display and light-weight brightness.2.Please enable slight handbook measurement deviation for the data.