I use these to tack a piece of fabric for gridding (so I don't have to keep moving it around on a smaller frame/hoop). I don't use the bars for stitching though, I'm not sure how well it would work for stitching as the corners aren't too secure. They slot together but they move fairly easily. You can buy a small set and try it, they're not very expensive, I just bought this set so I'd have a variety of sizes and can combine them to make different sizes. https://www.amazon.com/dp/B07D8GRLML/ref=cm_sw_r_cp_apa_fabc_EXMD0M32RQMXN0VYR2J1