3-Piece Step Drill Bit Set 4-12 / 4-20 / 4-32 mm
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Prices updated: 13 Oct 2026
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About this product
A 3-piece step drill bit set covering hole ranges of 4-12 mm, 4-20 mm and 4-32 mm. Step bits cut round holes of several diameters in sheet metal, plastic and enclosures, so you can fit sockets, switches and panel-mount connectors without changing bits.
Specifications
- Pieces
- 3
- Hole range 1
- 4-12 mm
- Hole range 2
- 4-20 mm
- Hole range 3
- 4-32 mm
Frequently asked questions
What materials can step bits drill?
They are commonly used in sheet metal and plastic enclosures. For metal, use slow speed and cutting oil to protect the bit and get a clean hole.
Can I use these bits with a hand drill?
Yes, they work in a hand drill or drill press. Start with the smaller step and work up gradually to the required diameter for a controlled hole.
