25/32 X 1 12,000-Series Annular Cutter. Hougen 12,000-Series Tap Drill, 1 DOC, For 7/8-9 Thread. Hougen 12,000-Series Annular Cutter. Cuts holes faster, more accurate and cleaner than competitive tools. Unique Hougen features provide the best performance in the widest range of materials. Tap drill size for 7/8-9 thread. 3/4 two flat shank. Made in USA.