The Allen Rail Mounted Aerovane - Clamp Only is the perfect accessory for motorboats. This versatile clamp can be easily attached to handrails, flag poles, or other tubes to securely mount a wind indicator. Its adjustable design allows for 90-degree orientation and the thumb screw makes for quick and effortless tightening or loosening. Please note that a wind indicator is not included. For compatible wind indicators, please click on the links below. PDF available for detailed technical drawing.