This is a professional grade tool set that's needed for adjusting the valves on a K100 or K75. The hook tool depresses the valve and the holder is then placed between the camshaft and the outer edge of the shim bucket, keeping the valve open and allowing you to remove the shim more measurement and replacement. The hook tool is then used again to remove the holder.
The tool is supplied as a set as you see here and delivered in a plastic storage pouch.
We also offer top quality valve shims!