Great for really small bearings
586794
The rental from the parts house wasn't small enough for the pilot bearing on my 01 ranger but this one worked like a charm
4709811
these are awesome. i bought them to run down a length of 80/20 in the center groove as part of a linear motion system. how can i argue with any of this? $2 each?  All bearings ran smooth. All plastic parts were well made and defect free. so cheap on a per piece basis I can't justify buying bearings in bulk, Polycarb in bulk, and making my own, even though I have a lathe....

I even thought of 3D printing the rollers.... but at this price... and PRIME shipping.... why? These are so versatile.... I can use them for rolling on the Inner V or the outer edges... I bought a few packages just to keep around for spare....
4728477
Looks like it will work just fine. I did as another review suggested and put a little 3 in 1 oil down in the bearings and then wiped off the excess. Seems to quiet it down and smooth it out some. If a person had all their fingers it probably would be too small but left index finger is missing due to an accident so it works great. HA! Did come with string included.
2592230
I mounted a pair of these on a 3/4" axle for a cart we pull behind our lawn tractor for gardening and light hauling.  Had to change out the bearings from 5/8" to 3/4", and that was easily accomplished.  I also used one of the included spacers, and it worked just fine.  The angled zerk fittings will make greasing the bearings an easy task.  No more flat tires!
1683159
Didnt get these for those retarded spinny thingies. Smooth bearing and im liking the way they're breaking in. Use them on my long board.
3192639
These bearing are awesome. I actually used them for a hand spinner I 3D printed for a friend and they are super smooth and glide very well. The only downside, just like almost all bearings like this, is that at first a little bit of grease/oil leaks out when they start spinning. Besides that these bearings work wonderfully. I imagine they would also work very well on a skateboard without any issues.
1696205
I'll be honest, if you want great bearings for the price, buy this and not reds. I recommend this to all of my friends, and they all agree that mini logos is wayyy better than reds.
For cleaning, i put couple drops of obsidian lube, and they roll forever.
3022270
Bought these for fidget spinners.  They out spin the full ceramic bearing I bought for $10 (for just one!).  With a little standard tri-spinner I got 2:03 spin.
218161
These are great bearings that last long unlike the random ones that came with my skateboard when I bought it. good price here, and they work very well.

Bones Reds only has a one-sided guard so make sure to install the guard facing outwards.
4468957
There are lots of adapters that fit many sizes of bearings, races and seals. My biggest issue is that the handle is significantly smaller than the Lisle unit that I have. After a few uses, the end of the handle has deformed.  I don't think it will last too terribly long.
3414314
The Bearings Are Fast As Hell. I Use To Ride The Regular Bones On A 7.725 inch Skateboard And I Can See A Major Difference.
2930798
Smaller than you think, but rides like a beast, I would suggest getting bigger wheels and new bearings.
2860460
works great on the regular size bobbins, not quite big enough for the oversize bernina bobbins, it doesn't stay on too well, they need to make some a little bigger for those
3012220
I was unable to locate a sealed bottom bearing for my fat bike, so I took out the one center poorly made bearing (which showed wear in only 3 months, and got these bad boys which makes them kind'a sealed, very efficient being in one place, (not moving from left to right), and i have double the bearings now. I feel a true noticeable difference for the better. So smooth! Excellent product!
3258109
Much too tiny for my needs, but I would expect these swivels could work well for smaller applications.  Thanks anyway!
3446334
I got these spacers for my longboard with 70mm wheels. They slipped right in with no problems and fit the bearings/wheels/axles perfectly. With these spacers, I can tighten the axle nuts lazily without having to "back off" the nuts to get a little bit of play and reduced friction. Nice add-on to stock wheels and bearings - I'd recommend these for any setup that they fit since it's a great upgrade and allows for easier, brainless axle nut tightening.
4192789
It works great for small boards, but is not designed nor deep enough to go through a 2x4.  - that is probably stated somewhere!