A combination type bit with screw point configuration, self-starting, very aggressive with fish accommodation on both ends (3/16″ shaft). Ultra-flexible shaft very popular with alarm installers. Penetrates quickly and easily. Easily resharpened with a good file. Slow back taper allows bit to be easily retrieved.
Longer models should be used with J712 (Manipulator).
| MODEL | DIMENSION |
| B 188 | 18″ x 3/8″ |
| B 182 | 18″ x 1/2″ |
| B 189 | 18″ x 9/16″ |
| B 248 | 24″ x 3/8″ |
| B 242 | 24″ x 1/2″ |
| B 249 | 24″ x 9/16″ |
| B 368 | 36″ x 3/8″ |
| B 362 | 36″ x 1/2″ |
| B 369 | 36″ x 9/16″ |
| B 548 | 54″ x 3/8″ |
| B 542 | 54″ x 1/2″ |
| B 549 | 54″ x 9/16″ |
| B 728 | 72″ x 3/8″ |
| B 722 | 72″ x 1/2″ |
| B 729 | 72″ x 9/16″ |