Grabbers are surfaced on both sides with a pad that provides antislip support to keep projects in place when sanding, routing, chiseling, sharpening and much more. Gliders are made from a high density, space-age, slick plastic that can be affixed to an object or mounted to a surface to provide a slippery pad for ease of movement. Need help moving something from here to there? Gliders snap into place under Grabbers, which can be placed under an object to make it easier to move, like a piece of furniture across a room. They can also be snapped together and mounted to provide a continuous slippery surface - like roller bearings. We found them inexpensive and indispensable to have around the shop and the home.