With this cube you can make or fix your rough and smooth decks, such as Invisible Deck or Brainwave Deck. We have tested this one in the shop and found it to be an effective way to rough cards without the need of sprays or applicators. There is no "dry" time and the small size of the block makes it perfect for on-the-fly or emergency repair work. Keep one in your close-up case at all times and you'll never have to worry about your rough and smooth decks losing their grip halfway through a set. Cube size: 2 1/8" long, 1 1/8" wide, 5/8" thick Depending on your application you can rough over 100 decks with just one cube. Non-Toxic! PLEASE NOTE: This is not the same item as the Rough Stick that Finn Jon put on the market in the 80s or the Roughing Stick that Harry Robson released around 2014, but it is intended for the same purpose.