Ukubhoboza amabhithi nge-engeli evunguzayo engu-28° kanye ne-engeli yephoyinti engu-118°. Ama-drill bits anephoyinti elihlukanisiwe lokunemba okungcono kokuma. Izingcezu zokubhoboza ezijwayelekile ezizosetshenziswa ensimbini nasensimbini esakhiwe. I-DIN 338.
| Usayizi (mm) | Ubude bomtshingo (mm) | Ubude bonke (mm) | Pakisha i-qty |
| 12.5 | 101.0 | 151.0 | 5 |