Dormer A321 HSS Steam & Bronze Tempered Drill Bit 4.2mm Pack of 10

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Dormer A321 HSS Steam & Bronze Tempered Drill Bit 4.2mm Pack of 10

Designed for consistent, reliable performance in medium-depth drilling applications, this set of ten Dormer A321 heavy duty HSS drill bits delivers exceptional durability and precision. Each 4.2mm bit is steam and bronze tempered to enhance hardness and heat resistance, making it ideal for use on a wide range of materials including steel, cast iron, and non-ferrous metals. The tri-flat shank design ensures superior grip and torque transfer, reducing slippage and extending bit life even under demanding conditions.

- Heavy duty high-speed steel (HSS) construction for long-lasting sharpness

- Steam and bronze tempered finish for increased surface hardness and lubricity

- Tri-flat shank provides anti-slip grip in standard three-jaw chucks

- Optimised point geometry for self-centring and fast chip evacuation

- Suitable for medium-depth drilling in metals and alloys

- Pack of 10 ensures value and availability for repeated use

- 4.2mm diameter – a versatile size for general maintenance and fabrication work

Whether you are a professional tradesperson or a dedicated DIY user, these drill bits offer the strength and stability needed for clean, accurate holes every time.

GTIN: 3603607072011