A tailstock tap & die holder should be among the first accessories a machinist makes for his lathe, since threading with a hand-held die stock, or holding a tap in a collet is seldom satisfactory. This Tailstock Tap & Die Holder will cut threads with either a tap or a die using a hand held holder that slides on a tailstock mounted arbor. Releasing ones grip allows the tap or die to rotate on the arbor with the spindle. For larger threads that cannot be hand held a stop handle that bears against the lathe compound prevents rotation as the threads are cut The (10) pieces are as follows: 1.Tailstock Arbor with #3 Morse Taper, 5/8'' arbor diameter 2. Sliding Knurled Sleeve, 1'' diameter with 5/8'' thru bore 3. Small Tap Chuck 0 to 1/4 '' Tap capacity 4. Medium Tap Chuck 1/4" to 1/2" Tap capacity 5. Large Tap Chuck 1/2" to 3/4" 6. Small Die Holder - 13/16" Die Diameter 7. Large Die Holder - 1" Die Diameter 8.Large Die Holder – 1.1/2” Die Diameter 9. Threaded stop Handle, fits the sliding knurles sleeve 10. Allen keys The two tap chucks grip the tap by the taps square like inserting a tap in a hand held tap wrench. All small taps from #6 and under have the same size shank and square. So this tool will accommodate all taps #000 to 1/2." Tapping or die threading is relatively easy. As with any threading, liberal use of cutting oil is recommended along with a slow spindle speed. For the smaller sizes the hand held knurled sleeve, with the tap or die installed, is pushed into the work piece, as the thread starts, the spindle roatation draws the tap or die towards the head stock cutting the thread. when the thread bottoms or comes to the designated length of thread, the operator releases his grip and the knurled sleeve, along with the tap or die rotates with the spindle until the lathe is stopped. Reversing the spindle backs the tap or die out toward the tailstock as the knurled sleeve is again gripped by the operator's hand. DESCRIPTION WITH THE BOX.