they are like having a keen boot on as a slider I make copper wire trees and use these tiny beads to mimic Japanese cherry blossoms, but the store I usually go to ran out. Now, to get one for my other old cars! I personally prefer the stand-trainer that I replaced this with. This unit came up in my search and I liked that it had the shelf above it that really didnt take much more space. Bottom part fell off and was lost. Le rapport qualité prix était satisfaisant, et je nétais pas regardant sur les défauts vu le prix dachat. From there its a slight slide downhill. These seem pretty great! If you dont feel comfortable doing the work yourself, do an online search for places that specialize in Birkenstock repair and resoles.