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I did a lot of work with hardwoods. The last quarter-inch or so the bit grabbed and basically "screwed" its way through to the other side, leaving pieces of undrilled wood to act as the threads.
I suspect that these drills will not perform well when drill through thin sheets of metal also. The problem wouldn't have occurred had I been using a drill press (I think), but given the very agressive nature of this drills I will limit the amount I use them, particularly with softwoods and with a handheld drill.
When I first bought these drill bits I was delighted. I used a handheld drill and did some drilling in softwood and it was rather frustrating.
I'd give these 3.5 stars, but decided to round up. They are agressive and the pilot bit makes starting large bits very easy.
Things changed this weekend.
GOOD QUALITY AND FAIR PRICEDeWalt DW1969 29 Piece Pilot Point Twist Drill Bit Assortment with Metal Index
This is very frustrating and is a major design flaw in my opinion.If you are set on this purchase, consider the package with the measuring tape:DEWALT DW1969TM Heavy Duty 29-Piece Pilot Point Set with FREE Tape MeasureOr the 25pc Black Oxide version with the normal tip:DEWALT DW1164 25 Piece Black Oxide Drill Bit SetNote there also exists a cobalt version with the Pilot Point tip:DEWALT DW1269 29 Piece Cobalt Pilot Point Metal Drill Bit Index Set Pros:- 1/64" steps- Very nice plastic case- No spin shank (also lets larger bits fit 3/8" chucks)- Pilot point really worksCons:- Gold Ferrous Oxide instead of TiN- More shank and less flute than your average drill bit- Design chews up wood badly (completely tears on exit)- Not good for soft woods (works better with harder woods)- Flutes seem less sharp than other bits- Too much heat concentrated in pilot point to give long life cutting metal- Halfway down flute, bits bite into wood, screw the drill until the chuck hits the wood requiring you to backout and try again.
Since it increments in 1/64ths, I can usually find the exact bit I need for the pen tubes of various types of pens. I needed a high quality set of brad points for drilling pen blanks. This set is everything I was looking for.
The bit sizes are very easy to read. The container is quite sturdy and very handy to use. This product is a quality drill bit set. The bits are high quality pilot point and work extremely well under many conditions.
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