I have used these and they have lasted quite a while with my drill press. https://www.amazon.com/Neiko-10198A-Metric-Drill-5-Piece/dp/B002LRLVRQ/ref=sr_1_3?keywords=neiko%2Bstep%2Bbit%2Bmetric&qid=1674835451&s=hi&sr=1-3&th=1
