Screwdriver structure

Screwdriver structure comprising:

• a handle, a rear end of the handle being formed with a projecting section, said projecting section having a frusto-conical shape;
• a circumference of the projecting section being formed with a predetermined number of holes at intervals, the holes extending into an interior of the projecting section, an angle being formed between an axis of each hole and an axis of the handle, an engagement section being formed at the projecting section;
• a stem disposed at a front end of the handle for driving a screw;
• and
• a rotary cap having a cavity inward extending from a bottom end of the rotary cap, an outer circumference of the rotary cap being formed with a plurality of through holes communicating with the cavity, an engagement section being formed at the rotary cap, the engagement section of the rotary cap being engaged with the engagement section of the projecting section, whereby the rotary cap is rotatably disposed on the rear end of the handle, the projecting section being accommodated in the cavity, said through holes being corresponding to said holes;
• when turning the rotary cap, at least one said through holes being aligned with at least one said holes;
• a predetermined number of ribs being formed on the circumference of the handle;
• the ribs being parallel to the axis of the handle;
• and
• said screwdriver being configured such that in operation a rod can pass through at least one through hole of the rotary cap and at least one hole of the projection section when a greater torque is required, and when not in use the screwdriver can be suspended on a projection by aligning the holes.