Cut accurate threads using any lathe with a Morse taper tailstock. These two-part tools consist of a holder that grips either a square-shank tap or a round die and a shank that mounts to your tailstock. The holder slides freely along a slot on the shank—also called floating—to reduce stress from driving the tap or die against your workpiece.

Kits come with a complete tool for cutting either internal or external threads. Taps or dies are not included. Add holders to switch to a cutting tool in a different size or type. Shanks are compatible with any holder, as long as they have the same Morse taper number.