I bought these countersinks despite at least one review mentioning that they are not straight. I thought a company like DeWalt would solve this problem. Not correct! The two bits I received vibrated heavily and one was acceptable. I tried returning them but Revane said they were non-refundable. Apparently the quick-change function on the bit shank is not set directly. Good Chinese quality control. I decided to use a hacksaw and cut off the quick coupler on all three. Now the bits spin easily, have gotten a little shorter, but are now ready to use. I put them in a box with other tools and sent them to my granddaughter for her new carpentry workshop. I have other DeWalt tools that I am very happy with. Perhaps it was the high-tech drills that challenged them.
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