The New Snow Plow Markers is sold as a set. Complete accessories. Including, 4 bolts, 4 nuts, 4 washers. Length: 27 inches. It is easy to install. Just punch a hole at both ends of the blade and fix it with 304 stainless steel mounting fasteners. The size is manually measured,reference to the actual received product. Do you have any questions about the product during the purchase process or after receiving the goods, please consult through Amazon. We will give you a satisfactory solution as soon as possible. WISH YOU A HAPPY SHOPPING !