3Pcs HSS Step Drill Bit Set Large Cone Titanium Bit Set 6/8/10mm Shank

Features:
Two-Flute Spiral Groove Design: Enables a faster, more stable and smoother cutting. It can automatically chamfer the hole to clean the drill bit.
HSS & Titanium Coated: Made of super strong HSS steel and coated with Titanium. Titanium coating ensures easy cutting Aluminum sheet, Copper, plastic, wood etc.
Application: Suitable for sheet metal, sink, car repair, etc. Widely used to cut holes in a variety of material like plate, aluminum, insulation board, PVC board.
Convenience: Step drill allows to cut several sizes hole with one drill bit, easily without changing bit constantly.

Specifications:
Size: 4-12mm/4-20mm/4-32mm
Material: High speed steel
Surface treatment: Nitriding (black)
Features: Quick Release
Quantity: 3Pcs/set
4-12 Drill Bit: 5 Steps (Diameter 4, 6, 8, 10, 12mm) (6mm Shank)
4-20 Drill Bit: 9 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm) (8mm Shank)
4-32 Drill Bit: 15 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm) (10mm Shank)

Package included :
3 x Spiral Step Drill Bit