Custom look with multi-sport function. Tracks allow infinite foot positioning for load carrying flexibility. Heavy-duty, black anodized aluminum track is corrosion resistant. Self-adhesive washers make hole line-ups simple. Innovative Flare Nut fastening hardware with PVC collar provides a water-resistant seal and eliminates headliner removal. Drill bits, flare-nut tool, and silicone thread sealant included. 54" flare nut length for steel roof application. Drilling required