Very poor manufacturing quality. Dial adjustment is stuck due to burrs on the steel body where the dial is fitted in. Z pre-setter top plunger surface is not planar with respect to the base (the total error is 0.06 mm tilted), so the Z pre-setter can not be calibrated. The product is not useable at all. I'm very dissappointed for the waste of time and money. Either this is a counterfeit of the original or this brand is really junk.