Good step drill. I received a complete set of stepper motor bits in 3 sizes from ACTOOL. I love that this is true high speed steel that should stay sharp much longer than many of the cheaper coated carbon steel bits. Only made a few test holes with this racquet and it cuts very well but long term sharpness remains to be seen. The bit comes in an individual plastic packaging similar to that used for end mills, which is very convenient so you don't have to worry about damaging the bit in your tool box.
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