The Boss MSC08110 are Stainless Steel XT and DXT Plow Wing Extensions. Increasing your blade width by a full 22" at a 30-degree angle, these convenient poly and stainless plow wings will cut your plowing time and attach and detach within seconds.(Excludes HTX plows & Heavy-Duty plows. The only DXT models recommend for plow wing extensions are the 8'2" Steel DXT and 8'2" Poly DXT. Wing extensions do fit other DXT sizes and do not void the warranty but are not recommended as the blade may sag when in the scoop position, due to the weight of the wing extensions.