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IRWIN 3016031ZR Single Cobalt Alloy Steel High-Speed Steel Drill Bit, 31/64" x 6" $5 & More + Free Shipping w/ Prime or on $25+

$5.00
$15.50
Rokket | Staff
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Amazon [amazon.com] has IRWIN 3016031ZR Single Cobalt Alloy Steel High-Speed Steel Drill Bit, 31/64" x 6" for $4.99. Shipping is free w/ Amazon Prime or on $25+

Product Description from Store
  • Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel.
  • Made from industrial grade High-Speed Steel for increased durability. 8% Cobalt Alloy Steel alloy is heat and abrasion-resistant
  • 135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface
  • Bit has a straight shank
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IRWIN 3016031ZR Single Cobalt Alloy Steel High-Speed Steel Drill Bit, 31/64" x 6" $5 & More + Free Shipping w/ Prime or on $25+
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Model: IRWIN 3016031ZR Single Cobalt Alloy Steel High-Speed Steel Drill Bit, 31/64" x 6"

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Sort: Lowest to Highest | Last Updated 6/2/2023, 12:31 AM
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Amazon$4.99
About This Product
    Product Name: IRWIN 3016031ZR Single Cobalt Alloy Steel High-Speed Steel Drill Bit, 31/64" x 6"
    Manufacturer: IRWIN
    Model Number: 3016031ZR
    Product SKU: B000CCS5A8
    UPC: 24721067227
    ASIN: B000CCS5A8
    Brand: Irwin Tools
    Item Dimensions LxWxH: 8.5 x 1.875 x 0.5 Inches
    Item Weight: 0.15 Pounds
    Item model number: 3016031ZR
    Manufacturer: IRWIN
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    Joined Dec 2015
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    > bubble2 38 Posts
    14 Reputation
    03-26-2023 at 06:34 PM.
    1/2" is same price also!
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    Joined Jun 2011
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    > bubble2 26,154 Posts
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    03-26-2023 at 06:57 PM.
    Quote from alfrank :
    1/2" is same price also!
    So it is, thank you for posting. Reps to you for your help.
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    Joined Feb 2007
    L6: Expert
    > bubble2 1,305 Posts
    552 Reputation
    03-26-2023 at 10:23 PM.
    Quote from dapaloo :
    seems to struggle with steel
    you can buy a set of cobalt drill bits for $8.50
    rather than $5 for 1
    Do you have first hand experience with these particular Hanson Cobalt bits? I've never used Hanson cobalt bits before, but I have used dewalt, Bosch, and Greenfield cobalt bits and all of them eat through mild steel like nothing, especially with the right speed, pressure and cutting oil.

    I really don't think you're going to find any legit cobalt drill sets for $8.50. The main brands all hover around $25-$40 for a 13 piece set. You might be able to get a harbor freight HSS or Titanium set for $8, but I doubt they'd last to long going through steel.
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    Joined Mar 2019
    L3: Novice
    > bubble2 179 Posts
    48 Reputation
    03-31-2023 at 08:12 AM.
    How is the US still using measurements like 31/64 of an inch in 2023? What is it going to take for the US to catch up with the rest of the developed world and start using normal metric measurements? Easy base 10 is the way, obviously.
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