Irwin 3041006 Speedbor Max 6 Piece 1/2-Inch to 1-1/4-Inch Self Feeding Spade Bit Assortment

List Price: $33.24 Discount Price: $21.19

Features:

• Fits all standard 1/4-inch quick change chucks
• Tri-Flute design for faster chip ejection
• Cutting spurs have 3 cutting edges for added durabilty
• Full screw tip allows the bit to self feed
• Grooved hex shank prevents slipping; lifetime warranty

Customer Reviews:

Great! [Posted on 2008-02-01]
These are fantastic bits! SPEEDbor indeed!

I had some old two-blade bits that did not have the "self-feeding" screw at the tip, and it would take at least a minute of difficult labor to get through a large (old) floor joist.

With these bits, it took less than ten seconds to get through the same joist, and the bit did all of the work. That's with a cordless drill, too!

The case is a tad large and has a stiff latch, but the important part - the bits - are great!

capable and quick [Posted on 2008-04-08]
i used the 3/4" drill for drilling through two pieces of wood that were sandwiched together for a total width of about 2.5 inches. i used a dewalt 18v on the low speed/high torque setting and it didn't have much trouble getting through the wood. the self-feed really does do the work for you, much better than the regular spade bits.

Nice until you hit a nail. [Posted on 2008-04-14]
These are okay. They work well until you hit a nail and then the are done. Unlike the flat spade bits I don't know how to sharpen these. Im sure you can, but I cant. So I went back to cheap $2 ones that I just treat as disposable.

Nothing Special [Posted on 2008-06-03]
I have tried these and they are nothing special. No advantage over a spade bit was seen.

Bosch Litheon PS20 not powerful enough. [Posted on 2008-07-04]
I bought these drills for use with the Bosch litheon PS20 cordless drill.
The bits seem to be of high quality. The self feeding feature pulls the cutting face into the work much too fast for the Bosch to handle. It stalls out even with a fresh charge. They would probably be good for a corded or more (much it would seem) powerful cordless.

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