Adjustable releasing tap holders are used in screw machines, turret lathes, CNC lathes, and reversing spindle automatic screw machines.

The tap is mounted in the tool holder directly or in a bushing; the holder assembly is adjustable to accurately align the tap with the workpiece. After it is started in the workpiece, the tap leads itself to a preset depth and draws the tool holder out of drive engagement with the tool head assembly, which permits the holder to rotate freely with the workpiece. Spindle reversal re-engages the tool holder, withdrawing the tap from the hole, and returns the tool holder to its original position.

The tool is easily changed from right to left-handed operation with a simple adjustment.