- Used in high-speed applications such as automotive, machine tools, and motorized propellers where center alignment of the shaft and an attached part is critical
- Mate a shaft or part with a semi-circular cutout to another part with a longitudinal slot cutout
| Type | Woodruff Key |
| Style | Woodruff |
| Size | 1/16" |
| Length | 1/4" |
| Material | Carbon Steel |
| Industry No. | #201, 202 |
