A tool bit providing a combined drill bit and reamer is disclosed herein. Specifically, the method improves the efficiency of a forming gas anneal by providing a multilayer structure having a catalytic layer formed thereon or buried therein which allows for a significant increase in the amount of hydrogen or deuterium which can be incorporated into the structure. At least a first and a second controllable switch are arranged in series with each other for generating an alternating current in the primary side of the transformer.