3pcs / Set Hexagonal Shank Nitrided Straight Fluted Step Drill HSS Pagoda Drill Hole Opener

1. Material: high speed steel
2. Application: suitable for drilling and reaming of wood, aluminum, plastic boards, insulation boards and other materials with a thickness of about 4mm or less
3. Universal hexagonal shank design, more convenient and solid clamping
4. X-shape opening design, effectively reduce drill bit slippage
5. Suitable for lithium drill, electrical drill, table drill, etc
6. Stepped structure, practical and strong
7. Specifications: 4-20 (9 steps): 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm; 3-12 (10 steps): 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm; 4-12 (5 steps): 4mm, 6mm, 8mm, 10mm, 12mm
8. Weight: about 85g (bag packing)