These work very well.
936068
These work very well. Black case. the red slider is easy to use. Analog scale is easy to read and accurate.
1242986
We find these to work better than other products.
3315620
these are awesome, they work wonderfully, :)
112344
These worked great and are still working great after a year or so.
3856971
These arrived well packaged and in excellent condition. More to the point they work really well.
2480871
They work very well for the price I'd recommend to a friend.
4734491
These worked very well!  I have had them before.
2355196
No more mowing near the trees....these do a great job.
2992047
These work very well.  You may need a dab of rubber cement to keep them from slipping off the bottom of the chair leg.  Four stars only because they do look a little clunky, so they are probably not for every situation.  But they work well.
527908
Love these they work really well and very smooth.
3188999
These work great and look good too. Good purchase.
1881118
These work very well and don't slip off of the glasses because of the way they attach.
258810
These are good quality for the price, and work great.
3241726
These are really great. The do what they need and very cheep.
228723
These work just like they are suposed to work, a great product that is well worth the money, I love it.
4605166
I love these very much.  They are very sturdy, and do the job well.  I wish they came in different colors.
1759270
I've used these before, and they are excellent.