Erbauer Spiral Flute Step Drill Bit 4-20mm Product Code: 8528D

Step drill bit with spiral flute. High quality bit providing a high level of precision and efficiency. M2 ground steel construction.


  • Excellent Torque Transfer
  • Built-In Deburrer
  • Rotastop Shaft
  • Spiral Flutes Remove Swarf
  • Cuts Wood up to 5mm Thick


Drills stainless steel up to 5mm thick. Drills wood up to 5mm thick. Outside bit diameter: 4, 6, 8, 10, 12, 14, 16, 18 and 20mm.
Additional Information
Technical Specification
  • Brand : Erbauer
  • Product Length : 96 mm
  • Product Type : Spiral Flue Step Drill Bit
  • Total Product Weight : 0.22 kg
  • Model No : 13-PPS006
  • Pack Size : 1
  • Capacity Wood : 5 mm
  • Capacity Steel : 5 mm
  • Product Diameter : 4-20 mm
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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Was €16.95

Special Price €13.95

Incl. 20% VAT

Save €3.00 (17%)

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Erbauer Spiral Flute Step Drill Bit 4-20mm is rated 5.0 out of 5 by 17.
Rated 5 out of 5 by from a good drill on the hole.. needed to make some accurate hole in a metal plate to take some switched, tried a regular drill bit and failed, this multy size drill bit made the job very easy..
Date published: 2017-09-02
Rated 5 out of 5 by from Excellent for cutting SS Sink Used it to cut a hole in my stainless-steel sink for a water filter tap. Went through like butter. Brilliant!
Date published: 2017-05-24
Rated 5 out of 5 by from Excellent tool Used it to drill many holes of different sizes whilst doing a camper conversion, drilled panels with ease.
Date published: 2017-03-25
Rated 5 out of 5 by from Spirual flute drill bit Very good bit for acceptable price. I make over hundred wholes and still working like a new;-)
Date published: 2017-01-05
Rated 5 out of 5 by from Perfect for My Task Need to drill a 20mm hole in sheet steel bathroom cabinet for a wiring grommet. Drilled a small 3mm pilot hole and then used the drill. It drilled though each step until hole was at the max for this spiral of 20mm. It was a perfect hole and the grommet fitted perfectly. It just delivered what I needed. Excellent.
Date published: 2016-10-23
Rated 5 out of 5 by from Step drill. Excellent bit of kit, needed to drill through aluminum pipe , piece of cake with this.
Date published: 2016-05-12
Rated 5 out of 5 by from what size do I need? Great drill bit if you don't know the size you need, I knew I needed to drill a hole between size 13 - 15 and this little gem made this so easy!
Date published: 2016-04-07
Rated 5 out of 5 by from Cut above!! Bought this for some conduit cut outs,looked the part with good width markings and cut like a dream.Wish all my drill bits were this good!!!
Date published: 2016-03-27
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