The black chungking bristle version is very stiff and converges to a 1/8" face.
The white goat hair brush is very soft with a polishing face of 1/4".
Both have a maximum operating speed: 3,450rpm. Made in Germany.
| Style # | Bristle Type | Trim Length | Wheel Diameter | Arbor Hole |
| 48CK | Hard | 1/2" | 1-7/8" | 1/4" |
| 48SG | Soft Hair | 1/2" | 1-7/8" | 1/4" |