Clips save time and labor compared with other trellising methods. Quick-release feature allows growers to move clips during the year or save them for multiple seasons. White plastic clips allow for a 3/4 diameter stem and have side openings for better ventilation. We recommend using ASIN# B004HMT5LW Tomato Twine as other twines may be too large and not effectively hold the clips in place. Clips also work with cucumbers and other vine crops. Use with Trellinet, Trellis Plus, or fine nylon cord. Not for use with Sisal Trellis Twine. David?s Garden Seeds and Products is a Veteran owned business that has been offering quality products and service since 2009.