Flag pole holder made out of stainless steel. This flag pole holder can be mounted horizontally or vertically onto the railing (22mm). The flag pole holder can be rotated 360°. The flag pole holder is narrower at the bottom to prevent the flag pole from slipping out, and it has a thumb screw for additional safety. Suitable for flag poles with a diameter of 22mm. diameter mounting bracket: 22mm diameter inside: 22mm