Parameters:

1. Product material: High-speed steel 4241 (suitable for workpieces with a hardness of 25 or less, such as thin iron plates, insulating plates, wood boards).

2. Product specification range: 4mm-32mm.

3. There are 15 steps: 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm.

4. Drill shank interface: 6.35mm hexagon shank straight groove.

5. Individual size: total length 102mm, length of each blade 5mm, bevel height 1mm, total length of shank 25mm, total length of blade 77cm.

6. Cutting material: thin iron plate, aluminum material, insulation board, PVC board wood thickness is within 5mm. A single drill can be used to make a variety of eyelets.

7. Product features: This step drill is made of high-speed steel and has good quality. Each segment has a length of 5mm, and can drill a variety of holes with a single drill. Suitable for making holes in thin iron sheet, aluminum, insulation board, PVC board, wood, etc.