PURPOSE: To measure screw setting before removing the screw in a very precise method and accurately drive again the screw.

CONSTITUTION: This turn-counting screw driver is constituted in a manner such that a tubular member 4 which is movably mounted on the stem 1' of a blade 1' can move in the recess 5 in the handle 2 accommodating the stem 1' of the blade 1, and the handle 2 is graduated over its periphery at the inlet to the recess 5 and the movable tubular member 4 bears double graduations 6 and 6' over at least part of its length, each graduation extending in the opposite direction relative to the other.