4-12 4-20 4-32 6.35mm shank 3PCS Hexagonal handle HSS,spiral groove,stepped drill,pagoda thin iron plate drill

1. Cutting materials: thin iron plate, aluminum, insulation board, PVC board thickness of wood within 4mm. With a drill to make a variety of holes.

2. Material:high speed steel 4241 (suitable for use in the hardness of 25 ° below the workpiece, such as carbon steel, thin iron plate)

Specifications:

4- 12mm 9 steps

(4,5,6,7,8,9,10,11,12mm)

4-20 mm 9 steps

(4,6,8,10,12,14,16,18,20mm)

4-32mm 15steps

(4,6,8,10,12,14,16,18,20,22,24,26,28,30,32 mm)