"Dual" Horizontal Round Rail Mount. (Heavy Duty). T10-585 Fits Oversize Round Rails 1-1/8' or 1-1/4' (28.5 mm or 32 mm). Incredibly strong and rigid, these rail mounts will not slip on the rail. They have a uniquepivoting design which allows them to attach to curved rails or across the corner of a sternrail. Made of 18-8 stainless steel and 356 hard anodized aluminum, they instantly detachwithout tools for compact storage leaving no hardware on the rail.. NOTE:. **Not for use with the A10-801 "TrailMate" Connoisseur Series Gas Gril