HSS Twist Drill Bit, DIN338RN Cobalt 5%, 990 Series
Product Description
1, HSS twist drill bit DIN338RN, Cobalt 5%, Fully Ground for professional drilling various steel, metal, alloy, iron, stainless steel, inox, etc.
2, 135degrees split point for durable drilling performance with 5% cobalt up to hardness HRC64-68
3, Four times of tempering guarantee that professional drilling performance for professionals and industrial applications.
| Item Number | Diameter(mm) | Spiral flute length(mm) | Overall Length(mm) |
| 990.3380051 | 0.5 | 6 | 22 |
| 990.3380061 | 0.6 | 7 | 24 |