DeWalt 8mm Extreme 2 HSS Drill Bit Product Code: 31140

Stronger and faster than standard bits. Tip starts drilling on contact, eliminating walking for clean accurate holes. Innovative tapered web design greatly reduces breakage. Gold ferrous oxide coating prevents overheating for longer bit life.


Diameter 8mm.
Additional Information
Technical Specification
  • Brand : DeWalt
  • Product Length : 117 mm
  • Product Type : Extreme 2 HSS Drill Bit
  • Total Product Weight : 40 kg
  • Model No : DT5052QZ
  • Pack Size : 1
  • Product Diameter : 8 mm
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery service up to 3 working days: €8.95

Free delivery on all orders over €70.00

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€4.25 Incl. 23% VAT

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DeWalt 8mm Extreme 2 HSS Drill Bit is rated 4.5 out of 5 by 82.
Rated 5 out of 5 by from Excellent drill bit Just bought a few of these to drill wall plate to 30mm thick steel. 20 holes in and still going strong on the first bit - no signs of dulling yet. Great value. Buy one!!
Date published: 2018-01-09
Rated 5 out of 5 by from Really excellent I had nine 8mm holes to drill through a 20mm steel bar. Did nearly 3 with one (old type bit) in about 1 hour. Tried a DeWalt and completed the other 6+ in about 30 minutes. This drill bit is so superior it is difficult to describe. Very highly recommended and I'll never buy any other type for drilling metal.
Date published: 2017-12-09
Rated 5 out of 5 by from Good Drill Bit Good drill bit, you would expect nothing less from DeWalt. I like the idea of the smaller diameter quick start tip.
Date published: 2017-11-28
Rated 5 out of 5 by from Only Drill Bit for Stainless Trying to drill stainless steel strip (5mm thick) which seems incredibly hard. Used 3mm to 8mm drills in cobalt and even hss tct (specifically for s/s) with dismal results even with low speed and plenty of cutting oil. No success with the conventional tipped extreme 2 at sizes less than 5mm but the 5mm and above with pilot and "flat" tip are completely different and worked superbly and cut easily. Didn't push drills, but drilled at slowest speed and with plenty of water spray to keep bit cool (top YouTube tip on drilling stainless) and stepped up in drills in increments to be on safe side. Cut a dozen holes to 10mm easily. Probably can push drills much harder next time!
Date published: 2017-08-31
Rated 5 out of 5 by from drill bit Great drill bit went through a euro lock with ease and fast shame a little pricey but worth it
Date published: 2017-08-20
Rated 5 out of 5 by from Tough drill bit Having destroyed 4 standard black and decker HSS drill bits trying to get through a 5mm steel bar I decided to invest in the correct bit of kit for the job. This bit totally sailed through the steel no problems at all! For tough jobs this is highly recommended.
Date published: 2017-07-24
Rated 5 out of 5 by from Truly Awesome I have been drilling 7mm angle iron with 8mm holes Having bought some 'jobbing' drill bits and broken 3 on first 12 holes now bought some DeWalt Extreme. No comparison No pilot hole needed. Drilled a further 160 holes with two Extreme bits - no breakage - still sharp - could probably have got away with 1!!
Date published: 2017-04-19
Rated 5 out of 5 by from The Best! Done job much quicker! In Previous jobs have to using several HSS drills to make holes in metal. Only one Drill used to complete my previous whole job. Would buy again in the future!
Date published: 2017-03-30
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