George Wilkerson from Joshua, TX United States
Happy to receive the Micro drill bits but unhappy that they are not sharp enough to drill into plastic using a hand vice. I bought these to re-supply the ones I broke and was using these to drill holes for fibre-optics. They don't cut because the tips are not sharpened properly. Fortunately I didn't spend much money on the product. Don't recommend unless you have a way to sharpen these.
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Nice diamond crusting
June 12, 2015
Donald McNeill from Redding, CT United States
I haven't had a chance to use them but they have a significant amount of diamond coating.