3Pcs 3-12/4-12/4-20mm HSS Titanium Coated Step Drill Bits with Automatic Center Pin Punch

Material: HSS / High Speed Steel

Surface Treatment: Titanium Coated

Shank Size: 1/4" Hex Shank

Includes a five-step bit, nine-step bit and ten-step bit.
Quantity: 3pcs

 

The 3 Cutters Come in the Following Sizes:

4-12mm: 4mm,6mm,8mm,10mm,12mm

4-20mm: 4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm

3-12mm: 3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm

Center Punch: General type 6mm automatic center pin punch
Material:
Bit material: hss steel
Main body material: tool steel
Total Length: Approx 128mm
Bit diameter: 6mm

Features: 1. Including 1pcs center punch and 3pcs step drill.
2. Can use step drill to open hole before using the center punch.
3.It is very suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc
4.Adjustable automatic center punch.