12.0 x 151mm Dormer HSS Ground Twist Drill

The 12.0 x 151mm Dormer HSS Ground Twist Drill is a premium-quality precision drilling tool designed for accurate, efficient, and long-lasting performance in a wide range of materials.
  • Product Code: 71439
  • Length: 151mm
  • Diameter: 12mm
  • Availability In stock
£7.58 £6.32
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Manufactured from high speed steel (HSS) and fully ground for enhanced cutting accuracy, this drill bit is ideal for professional engineering, fabrication, and general workshop use.

Engineered for superior performance, this Dormer twist drill delivers clean, precise holes in materials such as steel, cast iron, aluminium, non-ferrous metals, and plastics. The ground flute design ensures smooth chip removal, reduced friction, and improved drilling efficiency, helping to extend tool life and maintain consistent performance.

The 12.0mm diameter combined with a 151mm overall length provides excellent reach for deeper drilling applications, making it suitable for installation work, metal fabrication, and maintenance tasks where access is restricted. The precision ground point ensures accurate centring, reducing wander and improving starting control.

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Delivery Information:

Free Next Day Delivery on orders over £50 to Office, Home or Site.

Orders placed before 4:00pm will be dispatched same day on a next working day service.

Kindly note that our working days are Monday to Friday. Orders placed after 4:00pm on a Friday will be dispatched on Monday using a next working day service, with an expected delivery on Tuesday.

Method Price
Order Value Under £50 (ex. VAT) £8.00 ex. VAT
£9.60 incl. VAT
Order Value Over £50 (ex. VAT) FREE


Please note some areas and bespoke products such as plasterboard may incure additional delivery charges. If this is the case we will call or e-mail you to discuss.


Plasterboard & Ceiling Grids/Tile Deliveries

Orders to Andover, Winchester, Basingstoke and Reading can be ordered directly online with a delivery charge of £50.00 (ex. VAT) and £60.00 (incl. VAT). Orders to other areas in the United Kingdom can be ordered via e-mail / phone enquiry. Delivery charges will be based on product weight, dimensions and postcode location. Delivery will be quoted on a case by case basis.

Items not required

Should you require to return any item, we will allow you to do so within 14 days of receipt of the item for a full refund.

To begin the process of returning any item please email [email protected].

Return Handling Fee

A handling charge of £10.00 (ex. VAT) per parcel will apply to returns.

For larger orders sent via pallet or dedicated/special courier a handling charge of 20% of the paid value of the returned goods will apply to returns. 

A refund for returned items will be processed within 14 days of collection.

All items must be in their original packaging (where applicable) and unused.

Incorrect, Missing, Faulty or Damaged Items

Should we supply any incorrect or damaged items, or you discover an item is missing from delivery please notify us within 48 hours of receipt on 0333 005 7088 or email [email protected].

For incorrect or damaged items, we will then arrange to pick up the item and either send you out a replacement or process and refund within 48 hours.