FYI: The Brother "pressers" are unique to the Brother 230 ribber (KR230). They come with the ribber. This was the original Brother Bulky. I use them sometimes with heavy yarns but they fit only in the carriage of the KR230 and are called for in the manual instructions for this model. Most of the time I use just weights and it works fine. The Brother KR260 ribber which fits the KH260 and KH270 does not have these. I checked the manual.