3pcs HSS 4241 Hex Shank Step Cone Drill Bit Set Hole Cutter

Features:
- Set of 3 for jobs of all sizes.
- 2 fluted edges for faster, smoother cutting.
- Hex shank prevent slippage when in chuck.
- Surface treatment: Titanium plating.
- Ideal for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc.
- Material: HSS steel.
- The lengths are separeately 104.5mm ( 15 step ), 74mm ( 9 step ), 67mm ( 5 step ).
- Rotational speed: 600rpm
- The 3 cutters come in the following sizes:
4 - 32mm ( 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm ).
4 - 20mm ( 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm ).
4 - 12mm ( 4mm, 6mm, 8mm, 10mm, 12mm ).