Torque Cylinders:

• The dynometric design helps prevent over tightening of the screw, stopping any damage to the thread.
• When the screw has fully tightened, the drum clicks around without the screwdriver turning.

Extra Grip Drums;

• Provides extra grip and clamp force
• Removable, can be used on any dynometric screwdriver size

Additionally:

• Dynometric cylinders or extra grip drum can be used on any dynometric size screwdriver
• Cylinders or drum can be positioned anywhere on the screwdriver
• It is possible to mount 2 cylinders, one for total screw control, another for total unscrew control