The  commercial scallop rug tool is 14” (356mm) across, and includes a wrap around bumper to protect walls and furnishings. Scallop tools are tailor made to work well on carpet, and this particular one is most effective in a commercial environment. The 69328 fits 1.5" (38mm) connections, and is black in color.  This fits Proteam, Sandia, Mosquito, Sanitaire, Powr-Flite, Tennant, Nobles, NSS, and many more that use the 1.5 inch tools