[4-32mm]

[4-12mm]

[4-20mm]

Feature:1 High speed steel, more durable
2. Coated Nitride to reduce friction and run cooler
3. No drilling required, deburring holes automatically at the same time.
4. Special step structure allows you to drill different size holes.
5. Single stage drill can be used as one box drill bit.
6. Water cooled can effectively extend the service life of the bit, and the drilling speed is 250-400 is recommended. Widely used to drill holes in a variety of materials such as thin steel, wood, thin iron, aluminum alloy, and insulation plate
Specifications: Type: Spiral Step Drill Bit
Material: High Speed Steel
Coating: Coated Nitride
Pattern: Triangle
Scope: Thin iron plate, aluminum, insulation panel, PVC panel, 0.02 inch (0.4 mm) thickness inside wood, 0.16 - 0.4 inch (4 - 12 mm): 0.16 - 0.39 - 0.47 inch (4 - 6 - 8 - 10 - 12 mm)
0.2 - 0.8 inches (4 - 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 mm) 9 levels
4-32mm: 4-6-8-10-12-14-16-18-20-22-24-26-28-30-32mm 15 Tiers
Package Included: 1x HSS Hex Shank Nitride Coated Spiral Groove Step Drill Bit