Designed to be compatible with Furnace Industries rubber looped DRY ICE TOOLS, this is a variety pack of hardness. The protruding balls all range in the 2" to 4" diameters which means you can't easily loop the device over them. In some cases, you may have to "force majeure" on to them. Once on them, you are good to go but getting on is another story which is why this is our favorite. We consider this set, when used in steep terrain the be the hardest of this line.
- base measures approximately 5" x 5"
- protrudes from the wall 3-1/2"