This router works great on my CNC when I need to plan an MDF desktop. Unfortunately, the seller did a terrible job of finding the right packaging for the device, as other buyers have noted. I received mine in a large plastic tube that had more than enough room for the bit to shake and inevitably found that 2 of the 3 carbide bits were broken off. Disappointing, but thankfully the earbuds have four sides and aren't that difficult to rotate. Bit gets 5 stars but not 2 stars because of terrible packaging.