The Dutch Treat Perforated Paper Frame is designed specifically for the needle worker who likes to work on perforated paper. The frame has clamps which hold the paper securely for working and avoiding the possibility of bending the paper. The frame is designed so the paper is elevated above the table so you can get your hand under the bottom clamp for easy access to the entire surface. The side bars have 4 holes so you can select the holes to fit your project. The side bars and knobs are packaged together. The clamps are sold separately (see related products). The clamps are interchangeable with scroll dowels so the frame can be used for other types of needlework.