KASTWAVE 2-Pack CR10 Z-axis T8 Anti Backlash Spring Loaded Nut Elimination Gap Brass Nuts for Upgrade Ender 3, Ender, 3s Ender 3 Pro V2 CR-10 Tornado 3D Printer 8mm Acme Threaded Rod

Sent different shape which is not good for all printers without modification. If you are not familiar with that don’t buy this item

The product on the picture is the required one to fit my printer. The received one is different and will not fit. The flange is circular, not as the picture and cannot be assembled.

I bought these to fit to an ender 3 pro. The quality is very good with no noticeable burrs or sharp edges on the brass nuts. The only issue, hence losing a star, was that the supplied nuts had round fixing flanges meaning that would not fit the ender 3 pro as there is not enough clearance between the extruder motor and the mounting location for the anti-backlash nut. Easily solved by cutting the excess brass off to create 2 flat sides. I found that I also had to open up the bolt holes to allow proper alignment. Once fitted the problematic z axis dropping was completely solved.

The picture dose not represent the product.What I received has 4 screw holes, in the picture it has only 2.

The item received is slightly different from the picture ( round mounting with 4 holes vs rectangular with 2 holes) but I was able to mount and it works as intended.