Thicker, stronger aluminum in an innovative shape that provides increased stud rigidity while reducing track wearSingle backer measures 1.250" wide x .145" thick aluminumDouble backer measures 1.280" wide x 2.250" thick aluminum (1" hole distance)Radial lobe shape means the weakest flat corner areas of standard backers are reduced so the corners do not bend like standard backers, plus unnecessary weight is reducedCombine the best benefits of square and round backers in one designAvailable in plain aluminum finish
