Easy to Use, High Quality, Engineering at its best!
These things are cool. I originally had the bronze/gold looking plates with 4 wheels on each. These were okay, but they are annoying to install and they didn't work well on my wider ski sleds or sleds that had longer bolts. These are waaaaaaay better. Once they are setup they work fast and they work good. Very good design. Engineers doing what they should be doing! Not cheap, but they appear that they will work great and last a long time.