An insertion end of a tool is driven along an axis at least partially
rotary or percussively, which extends along the axis within a maximum
guide diameter. At least one longitudinally closed locking groove and
rotary driving groove is longitudinally closed at a longitudinal locking
end towards the free leading end. The rotary driving groove has a groove
width with at least one tangential force contact surface. At least two
rotary driving grooves have a length of at least three times that of the
guide diameter are arranged on the tool-side ahead of the longitudinal
locking end, and have a contact length at least 1.5 times the guide
diameter configured to be one fifth of the guide diameter.