Extensions and tool holders for manual operation make the use of taps and dies possible. The adjustable holding tools are made of zinc die-cast or steel. They apply enough torque to the taps and dies so that you can cut your threads by hand.
Every tap manufactured according to DIN has a square at the end of the shank. To ensure that the tap and its square end fit together, the DIN 10 standard defines the dimensions for the outer square of the tap. Round Dies, on the other hand, have grooves or holes on the lateral surface. The dimensions for the die diameters, heights and the mounting holes/grooves are defined in DIN EN 22568 (formerly DIN 223 B). This ensures that the corresponding dies fit into the respective die holders.
BAER tool holders are stable and durable. Convince yourself.