These hooks make it easy to organize your pegboard and created a nice storage system for all your tapes, rolls and ribbons. 3/8" x 12" long wood (birch) dowels (3) are included with the Complete Sets. These hooks work with any 1/4" pegboard. To extend beyond 12in, order additional hooks (we recommend using one hook every 12in of dowel length). Tips: If you have difficulty inserting the 3/8" dowels, we have found that sanding off the ends of the dowels help reduce the size just enough that they will slide in and still keep a nice tight fit.