| 173 / | HD | TOOL DRIVING OR IMPACTING |
| 90 | DF | IMPACTING DEVICES (E.G., HAMMERS) {19} |
| 104 | DF | .~ With means for rotating tool {2} |
| 109 | DF | .~.~ Rotated by hammer head or drive for hammer head {1} |
| 110 | | .~.~.~ Rotation is intermittent or oscillatory {1} |
| 111 | DF | .~.~.~.~> Rotary drive path is directly through hammer head |