Product Specification
| Model | Drill Diameter | Total Length | Working Length | Drill Shank Diameter |
| 1mm | 1mm | 54 | 12 | 6.3mm |
| 1.5mm | 1.5mm | 63 | 17 | 6.3mm |
| 2mm | 2mm | 67 | 24 | 6.3mm |
| 2.5mm | 2.5mm | 75 | 30 | 6.3mm |
| 2.8mm | 2.8mm | 81 | 33 | 6.3mm |
| 3mm | 3mm | 81 | 33 | 6.3mm |
| 3.2mm | 3.2mm | 85 | 36 | 6.3mm |
| 3.5mm | 3.5mm | 90 | 39 | 6.3mm |
| 4mm | 4mm | 95 | 43 | 6.3mm |
| 4.2mm | 4.2mm | 95 | 43 | 6.3mm |
| 4.5mm | 4.5mm | 100 | 47 | 6.3mm |
| 4.8mm | 4.8mm | 106 | 52 | 6.3mm |
| 5mm | 5mm | 106 | 52 | 6.3mm |
| 5.2mm | 5.2mm | 106 | 52 | 6.3mm |
| 5.5mm | 5.5mm | 113 | 57 | 6.3mm |
| 6mm | 6mm | 113 | 57 | 6.3mm |
| 6.2mm | 6.2mm | 119 | 63 | 6.3mm |
| 6.5mm | 6.5mm | 119 | 63 | 6.3mm |
| 6.8mm | 6.8mm | 108 | 69 | 6.3mm |
| 7mm | 7mm | 108 | 69 | 6.3mm |
| 7.5mm | 7.5mm | 108 | 69 | 6.3mm |
| 8mm | 8mm | 115 | 75 | 6.3mm |
| 8.5mm | 8.5mm | 117 | 75 | 6.3mm |
| 9mm | 9mm | 124 | 80 | 6.3mm |
| 9.5mm | 9.5mm | 124 | 80 | 6.3mm |
| 10mm | 10mm | 133 | 88 | 6.3mm |
| 10.5mm | 10.5mm | 130 | 84 | 6.3mm |
| 11mm | 11mm | 141 | 92 | 6.3mm |
| 11.5mm | 11.5mm | 141 | 94 | 6.3mm |
| 12mm | 12mm | 150 | 103 | 6.3mm |
| 12.5mm | 12.5mm | 150 | 100 | 6.3mm |
| 13mm | 13mm | 150 | 102 | 6.3mm |
Products Features
1: Higher cobalt content increases the hardness and wear resistance of the bit, making it suitable for high-intensity drilling operations.
2: Spiral flute design enhances chip removal, making drilling smoother and faster.
3: Provides better holding stability and prevents slipping, compatible with various power tools.
4: Suitable for drilling a wide range of materials including stainless steel, aluminum alloys, die steel, copper, steel plates, and cast iron.
Application
These cobalt twist drill bits are suitable for a wide range of industrial and home applications, including but not limited to metalworking, construction, mold making, and repairs. Whether you're handling complex metalworking tasks in a workshop or drilling metal parts in home projects, these bits provide excellent cutting results and long-lasting durability.
Products Pictures
Product Specification
| Model | Drill Diameter | Total Length | Working Length | Drill Shank Diameter |
| 1mm | 1mm | 54 | 12 | 6.3mm |
| 1.5mm | 1.5mm | 63 | 17 | 6.3mm |
| 2mm | 2mm | 67 | 24 | 6.3mm |
| 2.5mm | 2.5mm | 75 | 30 | 6.3mm |
| 2.8mm | 2.8mm | 81 | 33 | 6.3mm |
| 3mm | 3mm | 81 | 33 | 6.3mm |
| 3.2mm | 3.2mm | 85 | 36 | 6.3mm |
| 3.5mm | 3.5mm | 90 | 39 | 6.3mm |
| 4mm | 4mm | 95 | 43 | 6.3mm |
| 4.2mm | 4.2mm | 95 | 43 | 6.3mm |
| 4.5mm | 4.5mm | 100 | 47 | 6.3mm |
| 4.8mm | 4.8mm | 106 | 52 | 6.3mm |
| 5mm | 5mm | 106 | 52 | 6.3mm |
| 5.2mm | 5.2mm | 106 | 52 | 6.3mm |
| 5.5mm | 5.5mm | 113 | 57 | 6.3mm |
| 6mm | 6mm | 113 | 57 | 6.3mm |
| 6.2mm | 6.2mm | 119 | 63 | 6.3mm |
| 6.5mm | 6.5mm | 119 | 63 | 6.3mm |
| 6.8mm | 6.8mm | 108 | 69 | 6.3mm |
| 7mm | 7mm | 108 | 69 | 6.3mm |
| 7.5mm | 7.5mm | 108 | 69 | 6.3mm |
| 8mm | 8mm | 115 | 75 | 6.3mm |
| 8.5mm | 8.5mm | 117 | 75 | 6.3mm |
| 9mm | 9mm | 124 | 80 | 6.3mm |
| 9.5mm | 9.5mm | 124 | 80 | 6.3mm |
| 10mm | 10mm | 133 | 88 | 6.3mm |
| 10.5mm | 10.5mm | 130 | 84 | 6.3mm |
| 11mm | 11mm | 141 | 92 | 6.3mm |
| 11.5mm | 11.5mm | 141 | 94 | 6.3mm |
| 12mm | 12mm | 150 | 103 | 6.3mm |
| 12.5mm | 12.5mm | 150 | 100 | 6.3mm |
| 13mm | 13mm | 150 | 102 | 6.3mm |
Products Features
1: Higher cobalt content increases the hardness and wear resistance of the bit, making it suitable for high-intensity drilling operations.
2: Spiral flute design enhances chip removal, making drilling smoother and faster.
3: Provides better holding stability and prevents slipping, compatible with various power tools.
4: Suitable for drilling a wide range of materials including stainless steel, aluminum alloys, die steel, copper, steel plates, and cast iron.
Application
These cobalt twist drill bits are suitable for a wide range of industrial and home applications, including but not limited to metalworking, construction, mold making, and repairs. Whether you're handling complex metalworking tasks in a workshop or drilling metal parts in home projects, these bits provide excellent cutting results and long-lasting durability.
Products Pictures
