Magma Dual Horizontal Round Rail Mount - Oversized Rails [T10-585]Dual Horizontal Round Rail Mount Oversized Rails Incredibly strong and rigid, these rail mounts will not slip on the rail. They have a unique pivoting design which allows them to attach to curved rails or across the corner of a stern rail. Made of 18 8 stainless steel and 356 hard anodized aluminum they instantly detach without tools for compact storage leaving no hardware on the rail. Fits rail size 1 1 8" to 1 1 4" (2. 86 x 31. 8 cm) Compatible