The spring ball on these actually holds the nut in place while you slide the profile into position, which saved me a ton of fumbling on my last build. They drop right into 40-series 8mm slots too, so I didn't have to hunt down special hardware. Ten in the pack was just enough for my rig.
Emily S.★★★★★
These T-nuts drop right into the 8mm slot and lock securely with the spring ball. Made setting up my rig much quicker than expected.
Mia★★★★☆
These dropped right into my 40-series profile with 8mm slides and the spring ball keeps them from sliding out of place while I line things up. Only reason it's not five stars is that a couple of the ten had slightly stiff springs, but they loosened up after a few uses. Solid little set for the price