11580 Sherline WW COLLET ADAPTER The collet adapter goes into the #1 Morse taper of the headstock. WW collets are then placed in the adapter and are drawn up tight using the drawbar which passes through the hole in the spindle (not included with adapter). *NOTE: Our WW collet adapter does not have a keyway pin for the collets. Our customers have been using our WW collets on our lathes without a key pin for over forty years without any problems.