There_ always a _ut. Spindle itself Is great value for the money, but if you value your carbide mills take the included collets and nut and throw them in the trash. Don_ even take them out of the box. Right in the garbage. Then go order some good collets and a nut from a reputable source.The collet seat has about 0.00015 of runout, which is respectable. Once included collet it used to chuck in a test shaft, the runout grows to 0.001. Not great and will lead to premature endmill wear, not to mention inaccuracies in your cuts. Also, the spindle comes with 5-6mm, 3-4mm, and 1/2 collets. None of those are an ideal fit for 1/4 or 1/8 endmills. I got the 3-4mm collet stuck in the spindle bore when using 1/8 endmill. It compressed to the point of slipping out of the nut.