Title: Likely the worst tool accessory I've ever bought
Review: The tips of the bits fly off as if they were soldered on as an afterthought. And they were formed by "attaching" the cross-section tip into a pronged bit. They were useless within seconds. That's with relatively mild amount of pressure and new mortar. Really, don't buy these unless you're solely in the market for a gray case for masonry bits...the case was definitely the strongest component of this "tool".
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