Gun Drill Bits
Description:

Material: HSS (Suitable for use in the hardness below 25 degrees workpiece, such as carbon steel, the thickness of the plate in the 5MM)

Size:

1PCS: 3-12mm (3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm)--10 steps

1PCS: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)--15 steps

1PCS: 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)--9 steps

1PCS: 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)--5 steps

3PCS: 3-12mm, 4-12mm, 4-20mm

3PCS: 4-12mm, 4-20mm, 4-32mm