This HSS step drill bit set is designed for drilling into sheet metal and enlarging existing holes. Made from high-speed steel (HSS), the bits deliver clean results without burrs. Ideal for metalworking, assembly, and workshop use.

Applications:

• Suitable for thin metal sheets

• Perfect for enlarging existing holes

• Step design allows multiple diameters per bit

Set contents:

• 1× 4–12 mm (in 1 mm steps)

• 1× 6–20 mm (in 2 mm steps)

• 1× 6–30 mm (in 2 mm steps)