Our Works Nickel Engine Bolt Kits include all the exterior M6 fasteners on your engine. The bolts are class 10.9 carbon steel but are plated with pure nickel to give it that Nickel Works look. It looks like titanium without actually spending thousands on Ti. These bolts have a works look with a super reasonable price. Everything comes labeled and ready for your engine build. Photos are for reference only. Your kit is specific to your bike.