Uchida Corru-Gator Paper Crimpers are great for adding patterns to paper. Crimp everything from gift bags, bond paper, post cards, construction paper to foil–wide rollers crimp paper up to 8.5-inch. These work best on light-weight paper and creates a soft, embossed effect on light weight card stock. These imported crimpers are made of plastic rollers and body, and include instructions with illustrations printed on it.