Bird Pole Twist On Arms wrap around a 1 in. dia. bird feeder pole to add extra hanger arms. These are two 8 in. bird feeder hanger arms that need no tools, just twist on and it wraps around any 1 in. diameter bird pole. Lets you add arms and place where ever you like on the pole. Great for expanding an existing pole system to add more bird feeders. Suet bird feeders are one example that can be used on these extra arms. Bird feeder poles sold separately.