Precision tool adapters are used in screw machines, turret lathes, and CNC lathes.

The precision adapter is designed to allow the use of turret tools in machines larger than those for which the tools were designed. The adapter is of particular advantage when working on small diameters or on long pieces where interferences occur with larger size tools built for a particular machine. The adapter permits the use of smaller diameter shank tools n machines with larger shank capacities.