Step Drill Bits Spiral Straight Grooved Triangle Hex Quick Change Shank 1Pcs(4-20mm(9 Steps))

Taper Shank Drill BitsStep Drill Bits Spiral Straight Grooved Triangle Hex Quick Change Shank 1Pcs Type 1(Shank: Hex-Quick Change, Flute: Spiral)Step Sizes:4-12mm: 9 steps (4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm)4-20mm: 9 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)4-32mm: 15 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)Type 2(Shank: Tri-Straight, Flute: Spiral)Step Sizes:4-12mm: 5 steps (4mm, 6mm, 8mm, 10mm, 12mm)4-20mm: 9 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)4-32mm: 15 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)Type 3(Shank: Tri-Straight, Flute: Straight)Step Sizes:4-12mm: 5 steps (4mm, 6mm, 8mm, 10mm, 12mm)4-20mm: 9 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)4-32mm: 15 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)5-35mm: 13 steps (5mm, 7mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 30mm, 32mm, 35mm)10-45mm: 8 steps (10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm)Type 3(Shank: Hex-Quick Change, Flute: Straight)Step Sizes:3-12mm: 9 steps (3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm)3-13mm: 11 steps (3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm)4-12mm: 5 steps (4mm, 6mm, 8mm, 10mm, 12mm)4-20mm: 9 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)4-22mm: 10 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm)4-32mm: 15 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)6-25mm: 10 steps (6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm)6-35mm: 13 steps (6mm, 8mm, 10mm, 12mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm)

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