The Swingarm Medic is the perfect option for damaged or seized M8 chain adjusters. Use this kit to drill out the previous adjuster screw and/or clean out the damaged threads. Our proprietary adjuster screws also double as a tap. No silly threaded inserts needed, just brand new M10 chain adjuster screws in a newly threaded swing arm. Tools required to adjust new chain adjusters are 10mm and 13mm wrenches. This is the cleanest repair kit on the market. Included in the kit are: (2) tapping chain adjuster screws, (2) jam nuts, (1) drill bit, (1) anti-seize packet