PURPOSE: To effect utilization as rotation of a tool part (tool structure, such as a box wrench, a driver, a drill and the like,) having the lower end part of a rotary member by performing reciprocative vertical movement of a vertical movement member by a set size toward the rotary member.

CONSTITUTION: A saw tooth-form protrusions 4 are formed at equiangular intervals on the peripheral part of the upper surface of the large part 1 of a stepped columnar body 3 comprising the large part 1 and a small part 2. A triangular protrusions 6 are formed at equiangular intervals on the peripheral part of the under surface of a stepped part. A rotary member A having a tool part 7 is arranged to the lower end part of the small part 2. A stepped hollow part 10 comprising large and small hollow parts matching with the large and small parts 1 and 2 of the rotary member A is formed. Single-edged knife-form protrusions 11 are formed at equiangular intervals on the upper peripheral parts of the large and small hollow parts, and a vertical movement member B having an angular recessed part 13 is formed in the peripheral part of the upper surface of a stepped part (and a stopper). The large part 1 of the rotary member A is inserted in the large hollow part of the vertical movement member B and the small part 2 is inserted in the small hollow part.