DOUKNAIL Cobalt Cone Step Drill Bit - Cobalt 1 Piece 3-12/3-14/4-12/4-20/4-22/4-25/4-32/5-21/5-27/6-24mm

Drill-driver Spiral Step Drill Bits Straight Groove Triangle Quick Change Hex Shank 1pcs Type 1 (shaft: quick change hexagonal, 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) 4-32 mm: 15 steps (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 1 .024 in, 28mm, 30mm, 32mm) Type 2 (shaft: tri-right, flute: spiral) Step sizes: 4-12mm: 5 stages (4mm, 6mm, 8mm, 10mm, 12mm) 4-20mm: 9 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm) 4-32 mm: 15 steps (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 1 .024 in, 28mm, 30mm, 32mm) Type 3 (shank: tri-right, flute: straight) Step sizes: 4-12mm: 5 stages (4mm, 6mm, 8mm, 10mm, 12mm) 4-20mm: 9 steps (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm) 4-32 mm: 15 steps (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 1 .024 in, 28mm, 30mm, 32mm) 5-35mm: 13 steps (5mm, 7mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 30mm, 1.260 35mm) 10-45mm: 8 steps (10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm) Type 3 (shaft: quick change hexagonal, 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 stages (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) 4-32 mm: 15 steps (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 1 .024 in, 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