Feature●Bolt length: 3 1/2 inches - Skid Shoes width: 3 1/2 inches - Bolt diameter: 1/2 inch x 13 NC, bolts and nuts are all high strength grade.●The structure of the Snow Plow Blade Skid Shoes is the bottom disc is made of high-strength steel material, the bolts are made of high-strength grade, welded by superb welding technology, and the surface is galvanised, which is durable and not easy to rust.●Replaces Part Numbers: 2877245 and 2873423Description