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 (Nuts)

Bolts dont line up on Ender 3 Pro. Essentially useless for my dual z set up. May try and swap for a new set, maybe it was a one off, otherwise the one star sticks for bad QA. Side note, on a test fit on the guide screw, it seems like this would lead to binding. Seems like the threads are off ever so slightly after a few twists you feels a good amount of resistance, then it lets off, then tight, then loose, etc etc. Again... could just be bad QA.

These are exactly what they claim to be. Not much else to say.

One of these didnt even fit so seems like size isnt very accurate for these things

I loved this product. It really helped with my elephants foot problems! That and turning down my heat settings but you get the idea

I ordered two of these for an Ender 3 V2 rebuild. Very much two different sizes. I got the smaller one to work by enlarging screw holes and it functions but its clearly the wrong size. The larger one was perfect. If youre ordering these, you probably assume you have some z wobble due to the lead screws. These will help tremendously and watching how much they deviate gives you an idea of how bad the issue was.

Attempted to use these with some Oldham couplings on my Ender 3 Pro but had to use the original factory z screw nuts instead since the bolt hole pattern was too wide on these. Unfortunately cant return now as past the date. 1 star as description states it works with Ender 3 Pro.

Read the reviews. The bolt holes were misaligned as others noted. Prefer to buy a product that fits without modification. Did not work on Ender 3 v2. I took a chance hoping the issue was resolved, but isnt the case for me.

The face is not flat on the anti backlash screws creating so much play the antibacklash screws completely defeat the purpose of having them installed and I cannot use the stock screw as the connector bolts have been machined slightly too far apart for the stock screw, meaning you have to use their terrible screw instead.