The Crab Grab Skate Rails come with a look and design inspired by the classic skateboard rails of the 1980’s. These stick on foam rails give your board extra grip for grabbing, and traction for one-footed riding. Stick them out and tweak it out. Fake Screws - Why? Why not. C-Foam - Our specifically formulated rubbery foam blend that's lightweight, heavy duty, and grabs like a crab. Screw Glue - Glued on. Like it was screwed on. Gripples - Our signature texture: tiny little gripping nipples for maximum grippy-ness.