The machining on this chuck is very impressive. I will say make sure you take it apart and clean it before using, there was a lot of cast iron dust and burrs, dont let that scare you though thats how it is with most machining tools you get from china. I intially had .004 run out on my chuck but i didnt use the d1-4 backplate i had to convert it to L00 for my clausing, ive since dialed it in to under 0.001 and am very happy with it. i did a full tear down and review on my youtube channel, check it out if your interested. https://youtu.be/CnWz48_l_3Q

I am giving this chuck only 3 stars because of the fact that it catches chips in the scroll causing it to jam up when trying to open and close the jaws. As far as accuracy it's almost always under. 004 . I can usually get it down to about. 001 with some tweaking using the three different scrolls when tightening it up. But it's a little time consuming. I would say it's acceptable, but not great. I have revised my review to 5 stars for the fact that Vevor customer service contacted me based on my original review, asked questions relevant to the problems I encountered and took appropriate action to solve the problem. Great customer service and I am very pleased.