"I use these in a cordless hammer drill. They perform well, without having to apply too much pressure (esp useful on a ladder!). Only negative comment is that they could do with 3 flats on shaft to give the chuck extra grip and to stop them slipping back into the chuck - need to tighten them down well which can be hard on the wrists. Could also do with being a bit longer, another 20mm would be perfect."
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Review 2 for Makita Brickmaster TCT Drill Bit 5.5 x 95mm