Great for mounting body panels-we put this kit together for looks and performance. Kit comes with 1/8" thick heavy duty steel trick tabs inserted 1/4-20 rivnuts. The aluminum beauty rings have a clear coat to maintain the finish. Also included is the stainless steel flush head bolt which seat nicely into the aluminum washer. You have about a 1/4" space for material between the tab and washer. Great for sheetmetal projects and more. Trick Tab fits 1- 3/4" and 1-1/2" Tube nicely-can easily be modified to fit other sizes and uses.