Yes, I see now, we'll call it antid?rappants skates, and it is true that it is very convenient. But I thought it was much more expensive! ... I'll go see where I buy my stuff! ... We have four runners for 22 euros 10, with my right discount instead of 26. That made 27 dollards instead of 31.
This makes three times more expensive than you!...
In my store, they also sell the rubber mat which is much cheaper, 10 euro = 12 dollards. They are 30 centimeters by 80 centimeters and can stick a big block of wood. I just need to make two holes on the fields of the block and tighten it on my set with claws attached.
I would be a good table sanding flat on the cheap. I think I'll opt for that. Nothing prevents me also make me a little slip surface for small parts, because I can cut the carpet to the size I want.
In addition, it can serve me well for my router for my knives carving.