- For mounting on threaded shafts, these rubber expansion drums have a matching internal threaded bore. For mounting on smooth round shafts, these drums have two socket set screws. Ideal for motors, grinders, flex shafts & bench mandrels. Rubber expansion is controlled by tightening/loosening the hex nut.
| Width | 3 in |
| Drum Dia. | 3 in |
| I.D. | 0.5 in |
| Weight | 4.5 LB |
| EAN or UPC | 44861020517 |

