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 the handheld method. Faster: 4 to 5 times faster than threading with a single-point tool. Safe: Reduces chance for operator injury. Threadex™ Operating instructions: Step 1: Select head to fit desired to die O.D. r tap range, insert and ensure die or tap. Step 2: Select the appropriate shank and install it into lathe tailstock. Step 3: Slid ahead onto shan and advance tailstock within proximity of the workpiece. Step 4: Lock tailstock and advance holder with tailstock r=crank until head begins to self-feed. Step 5: Reverse lathe at the desired point and reverse tailstock crank a few turns as the head is backing off the workpiece. Die not Included.