- For attaching SAT holders to non-cracked concrete and natural stone with a dense structure ,- 4 screws: ø7.8 x 65 mm (wrench size: 13) ,- 4 shims: outside diameter: 24.0 mm, inside diameter: 8.5 mm ,- 4 heavy-duty dowels, 10 x 50 mm - Diameter Screw: 6,5 mm ,- Diamter of Heavy-Duty Dowel: 10 mm ,- External Diameter Shim: 24 mm ,- Inner Diameter: 8.5 mm ,- Component: Heavy-Duty Dowel/Screws 2 years legal warranty only