HSS Step Drill Bits Set Titanium Coated with 1/4" Hex Shank Packaging in Plastic Boxes Spiral Flute. The titanium coating ensures excellent durability and sharpness, thus reducing friction and lowering the working temperature. 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, the thickness of wood within 5mm. Made of super strong HSS steel and coated with Titanium, Titanium coating ensures easy cutting steel, Aluminum sheet, Brass, Copper, plastic, wood etc.

Specification:

• 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, the thickness of wood within 5mm.
• Made of super strong HSS steel and coated with Titanium, Titanium coating ensures easy cutting steel, Aluminum sheet, Brass, Copper, plastic, wood etc.
• Hex Shank 1/4"(6.35mm) will work with most drill or drills with 1/4" chuck , fits into power tools chuck securely and eliminates slip.
• Two-Flute Spiral Groove Design Faster, more stable and smoother cutting. It can automatically chamfer the hole to clean the drill bit.
• 1 x (4-12 mm), 1 x (4-20 mm), 1 x (4-32 mm) step drill, 1 automatic center punch. The step drills have three sizes to meet your different needs. And the package contained a Plastic box