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3 Piece Titanium Nitride Coated M2 High Speed Steel Step Drills - 91616 view this item at harborfreight.com »


Ratings: (5 is best)

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Review by axa on April 26th, 2012
i cant rate any better than 4 because i don't know how they would handle in heavy duty use, but ive they have stood up very well and worked very nicely for what i have needed to do. had them for years with not so much use.
Review by photoleif on March 20th, 2012
Not a best-buy but certainly a nice addition to one's tools if you already have normal twist drills, or I suppose if you only drill thin stock and don't have a set of normal twist drills. A bit pricey given what I'm used to with HF items, but it does work, and hasn't dulled or lost its TiN finish.

Probably wouldn't replace it item-for-item if it broke or were damaged beyond use. It's a bit of a specialty item for me, since I step using 29-pc or numbered/lettered bits instead.
Review by warezdog on October 27th, 2010
@ 7.99 I got no complaints. Bits are great up to mild steel, wouldn't use them on steel all the time but for wood these things will last for ever!
Review by Goomer on January 29th, 2010
They really do work and very well. They are for sheetmetal, anything close to 1/8" is about the limit, but for say, a new hole in a metal electrical box or panel they are great. I used to think these were sort of a gimmick, but used one (a Greenlee) on a job and saw the light. They don't grab, they drill straight in sheetmetal, they don't leave much of a burr and you can clean off what burr there is with the next step in the bit. And these seem to be as good as the Greenlee that was at least 10X the cost per bit.

The bits tend to stay on the mark when starting a hole and not skate around like a standard bit.

They will drill stainless, but it will dull them pretty fast. They are easy to sharpen by running a stone or small rotary tool down the inside of each flute. Its not critical to get each one even, they are a very forgiving design.

I did snap the tip off the small one trying to use it to drill out a pop rivet. Seemed like a good idea at the time, but that little steel core in the rivet caught and there went my tip. I blame me, not the bit.
Review by royesses on October 26th, 2009
They work! Not for heavy duty or stainless steel.

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