It seems that threads are a common bane of the airhead rider. I was a job shop machinist/ tool and die maker for over 25 years so I was constantly machining threads or fixxing them. Machined a lot of threads on the lathe both standard and metric. I've got several fairly extensive tap and die sets, again standard and metric. I see alot of guys run into this on their bikes. Fluid fill and drain holes messed up. Exhaust nut froze on the head. Threads gone or crossthreaded. What a mess. This little set can help in some situations. It contains both metric and standard. They are good to remove nicks and burrs and thread chasing. These are not intended to cut new threads. There are two thread files in the kit. One is out by the bikes being used. Some might want to add this kit to their tool inventory.