It depends on the material you are installing the pads onto
Landing Pad 6 (PN 8000226) includes cap nut hardware for fiberglass applications.
Landing Pad 7 (PN 8000227) includes plusnut hardware for sheet metal (passenger vehicle roof). Please note Landing Pad 7 is limited to 100lbs total weight
If you're not familiar with installing a permanent/custom installation we recommend you seek help from a professional.
Still have questions? Let us help, you can submit a support ticket here, or contact us by phone at 888-925-4621 during business hours