Cutting external and internal threads is simple, safe, accurate, and inexpensive. Simple: Cut threads on any lathe fitted with a Morse Taper tailstock. Accurate: Improves thread quality with fewer part rejections over hand held method. Faster: 4 to 5 times faster than threading with a singlepoint tool. Safe: Reduces change for operator injury. Threadex™ Operating instructions: Step 1: Select head to fit desired die O.D. r tap range, insert and resure die or tap. Step 2: Select appropriate shank and install into lathe tailstock. Step 3: Slid ehead onto shan and advance tailstock within proximity of work piece. Step 4: Lock tailstock and advance holder with tailstock r=crank until head begins to self feed. Step 5: Reverse lathe at desired oint and reverse tailstock crank a few turns as head is backing off work piece.Die not Included.