HSS Dormer Drill Bit 3mm
£1.48
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HSS Dormer Drill Bit 3mm
AT30305
£1.48
Free UK delivery on orders over £100
Usually dispatched within 1–2 working days
Secure checkout · 30-day returns
How to measure?
Measure the Outside Diameter (OD)
Pipe insulation sizes refer to the outside diameter of the pipe — not the bore (internal diameter).
Wrap a tape measure around the pipe, divide by π (3.14) to get the OD. Or use calipers across the outside of the pipe directly.
Pipe insulation sizes refer to the outside diameter of the pipe — not the bore (internal diameter).
|←— OD —→|Wrap a tape measure around the pipe, divide by π (3.14) to get the OD. Or use calipers across the outside of the pipe directly.
HSS Dormer Drill Bit 3mm
High speed steel drill bits (HSS)
Hardened Steel Heat Resistant
Ideal for everyday DIY use
Suitable for metal, plastic and hardwood
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