I purchased this item, and immedialy found an issue with the thread of the spindles. They would not accept my M10 x 1.5 bits. My bits or bit adapters would begin to thread in, but would stop before the bit seated against the spindle. I called into support to check and see if I had the right thread and pitch, but unfortunately they do not have any information on this unit. The instruction booklet, also did not have this information. So, rather than force a bit in, I decided to chase the threads with a M10 x1.5 chip clearing bottoming machine tap (McMaster#26355A46) Be sure to 'carefully' chase the threads as the spindle is hardened and it's not like tapping mild steel. Go slow and use a tap handle and tapping fluid. After I did this my taps thread right in and engage against the spindle as intended.