| Specification | Pack Qty | Code |
| HSS CO Twist Drill Bit 1.0mm | 10 | THCO010 |
| HSS CO Twist Drill Bit 1.5mm | 10 | THCO015 |
| HSS CO Twist Drill Bit 2.0mm | 10 | THCO020 |
| HSS CO Twist Drill Bit 2.5mm | 10 | THCO025 |
| HSS CO Twist Drill Bit 3.0mm | 10 | THCO030 |
| HSS CO Twist Drill Bit 3.2mm | 10 | THCO032 |
| HSS CO Twist Drill Bit 3.5mm | 10 | THCO035 |
| HSS CO Twist Drill Bit 4.0mm | 10 | THCO040 |
| HSS CO Twist Drill Bit 4.2mm | 10 | THCO042 |
| HSS CO Twist Drill Bit 4.5mm | 10 | THCO045 |
| HSS CO Twist Drill Bit 4.8mm | 10 | THCO048 |
| HSS CO Twist Drill Bit 5.0mm | 10 | THCO050 |
| HSS CO Twist Drill Bit 5.2mm | 10 | THCO052 |
| HSS CO Twist Drill Bit 5.5mm | 10 | THCO055 |
| HSS CO Twist Drill Bit 6.0mm | 10 | THCO060 |
| HSS CO Twist Drill Bit 6.5mm | 10 | THCO065 |
| HSS CO Twist Drill Bit 7.0mm | 10 | THCO070 |
| HSS CO Twist Drill Bit 7.5mm | 10 | THCO075 |
| HSS CO Twist Drill Bit 8.0mm | 10 | THCO080 |
| HSS CO Twist Drill Bit 8.5mm | 10 | THCO085 |
| HSS CO Twist Drill Bit 9.0mm | 5 | THCO090 |
| HSS CO Twist Drill Bit 9.5mm | 5 | THCO095 |
| HSS CO Twist Drill Bit 10.0mm | 5 | THCO100 |
| HSS CO Twist Drill Bit 10.5mm | 5 | THCO105 |
| HSS CO Twist Drill Bit 11.0mm | 5 | THCO110 |
| HSS CO Twist Drill Bit 11.5mm | 5 | THCO115 |
| HSS CO Twist Drill Bit 12.0mm | 5 | THCO120 |
| HSS CO Twist Drill Bit 12.5mm | 5 | THCO125 |
| HSS CO Twist Drill Bit 13.0mm | 5 | THCO130 |