As long as achieving to torque settings, the wrench will automatically disconnect the clutch to generate idling. So you do not worry about the occurrence of over-tightening.
By the lock structure, the wrench can lock the setting torque, therefore it can avoid the torque deviation in operation.

(N6-50LTDK type adopts this structure. )
N1.5 and 3LTDK used in fine work have the collet gripping the screw head.
After setting the demand torque, whoever can do the fastening in the same torque.

Every one has the attachment: Screwdriver head ( a casing head and hexagon head and so on. )
Two directions can be good or poor use of the screwdrivers.
Notes: During use screws and torque screwdrivers should be in the axis line