Bingyu BJY-10 Tungsten Carbide Alloy Drill Bits Twist Drill Stainless Steel Metal High-Speed Drilling 8mm 4pcs

Precision craftsmanship for durability and long service life

Sharp cutting edges for smooth drilling

High wear resistance

Specially ground head with enhanced hardness for excellent machining performance on workpiece materials

Round shank with chamfered design for easy use with standard electric drills and bench drills

| Diameter (mm) | Overall Length (mm) | Working Length (mm) | Packaging Quantity |

|---------------|---------------------|---------------------|--------------------|

| 3.0 | 60 | 30 | 10 |

| 3.2 | 60 | 30 | 10 |

| 3.5 | 60 | 30 | 10 |

| 4.0 | 90 | 30 | 10 |

| 4.2 | 60 | 30 | OT |

| 4.5 | 69 | 34 | OT |