High-Speed Steel Step Drill Bit Sets Multiple Hole Step Drill Bits for Woodworking 3Pcs
High-speed steel along with the strong coating ensures extreme durability, will stay new and it can shiny for years to come.
High-speed steel step Drill Bit Set provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (the board must be smaller in thickness than the height of step drill bits)

Material: HSS Steel

Length:

4-12mm Length: Approx. 6.7cm/ 2.64"
4-20mm Length: Approx. 7.4cm/ 2.91"
4-32mm Length: Approx. 10.2cm/ 4.02"

The 3 Cutters Come in the Following Sizes:
4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 2mm)
4-20mm : 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 14mm, 16mm, 18mm, 20mm
4-12mm (4mm, 6mm, 8mm, 10mm, 2m

What's in the box

1 x Five-Step Bit (4-12mm)
1 x Fifteen Step Bit (4-32 mm)
1 x Nine-Step Bit (4-20mm)