| 81 / | HD | TOOLS |
| 52 | DF | WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27} |
| 54 | DF | .~ Machine {10} |
| 57 | | .~.~ Gear-operated {9} |
| 57.11 | DF | .~.~.~> With motor {3} |
| 57.15 | DF | .~.~.~> Round work {6} |
| 57.22 | DF | .~.~.~> Multiple drive or driven means {1} |
| 57.24 | DF | .~.~.~> With support {1} |
| 57.26 | DF | .~.~.~> Adjustable angle drive {1} |
| 57.28 | DF | .~.~.~> Oblique angle drive |
| 57.29 | DF | .~.~.~> Right angle drive |
| 57.3 | DF | .~.~.~> Parallel axis drive |
| 57.31 | DF | .~.~.~> Common axis drive |