Northern Tool + Equipment has the Northern Industrial 29-Piece Dual-Color Cobalt-Coated Drill Bit Set for $40 + $8 shipping = $48 shipped. Features precision-ground 135° split point bits, double-rear open angle for better accuracy when drilling, and leaves a cleaner bore than HSS or titanium-coated bits.

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    Casecutter Ben's cred: 1487
    Posted 1:11 pm PDT 06/16/11

    Hum, I'll put my $8 Craftsman Black Oxides (set of 21) I just got up against these and see if they are worth 500% more... If you need holes cut to this precision (most often over and over like say skinning an aircraft) you by the specific drill. Don’t buy a set like this for DIY home use.

    Real Colbalt split points can be very nice drills when they adhear to NAS standards, but for these no names I wouldn't spend $48.
    http://www.grainger.com/Grainger/IRWIN-Drill-Bit-Set-3KPY7?Pid=search

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    dave_c Ben's cred: 3592
    Posted 2:05 pm PDT 06/16/11

    Good for drilling hard(er) metal where the heat generated would quickly dull lesser bits, but in the description are they coated with cobalt, or a cobalt alloy that is (also) coated? They appear to be only the former which reduces their uses to shorter term (much thinner metal) use period before cool down.

    The following set (also on sale) appears to be from same manufacturer but "cobalt" instead of "cobat coated", at higher cost of course so be aware of what you're getting.
    http://www.northerntool.com/shop/tools/product_7899_7899

    Casecutter just reminded me how crazy grainger's prices are, the grainer linked set can be had for ~ $90 on Amazon, http://www.amazon.com/Irwin-Industrial-3018002-29-Piece-Cobalt/dp/B000BO9JMK

    Last time I went to grainger all I wanted was 4 foot of temperature resistant fiberglass/silicone wire, the type you find in appliances wired to the heating element. They would only sell me a 100' spool of the stuff at about twice the cost per foot as what the local mom'n'pop sells it by the foot for. Crazy how they price the stuff, a manufacturer wouldn't buy only one spool at a time and nobody else would spend over $100 to get a length they need for one wiring job which is worth $3. Well, maybe an appliance repair man would...

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    Casecutter Ben's cred: 1487
    Posted 3:17 pm PDT 06/16/11

    You know, I was check’n Amazon for that set and I didn't get a hit. odd.
    For $90 w/shipping those Irwin Brand are nice as they're saying actual Cobalt M-35 Metal.

    While that N-T set of actual cobalt aren't bad; although I don't believe their same mfg, as it says "Includes metal case; A" Now, I don't believe they can say the case is made here, and fill with China bits... The green set doesn't say anything... so they're China.

    As to Grainger or N-T they're now both selling ton of offshore sourced junk and yes overpriced. The only thing from Grainger I'll grab is "clearance" a (use the company acct# to get a discount) then just pick-up down the street from the will-call drop... paying cash.

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    dave_c Ben's cred: 3592
    Posted 4:55 pm PDT 06/16/11

    ^ I suspect you're right about different factory, I was basing it on the cases looking identical from first glance (except color of course) but then I saw them zoomed in and there are several slight differences.

    I do think these are better than (same type) the junk you'd get from Harbor Freight and they get good reviews, though those at HF are a bit cheaper too at $60 for M35 Cobalt (minus 20% coupon when applicable), http://www.harborfreight.com/29-piece-135-degree-split-point-cobalt-drill-bit-set-36891.html

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