Applicable Heavy-duty Fagpole Diameter Range: BONWIN 2 Inch Large Diameter Flag Pole Ring Clips is specifically designed to install Heavy duty flag poles in the 1.6-2.0 inch diameter range. Note: Please check and measure the diameter of your flagpole before purchasing, then make sure you choose the correct size flagpole ring. | Adjust with Long & Short Screws: 2" Diameter Flag Pole Clips, the inner diameter can be adjusted by built-in adjustable long or short screws and allen wrench. 2 Pcs Long Screws fit for min 1.6 inch flagpole, 2 Pcs Short Screws fit for max 2.0 inch flagpole. | 360° Rotating & Anti-Wrap Design: Our Flag Pole Rings adopt upgraded 360 degrees rotating anti-wrap stainless steel ring piece design, and upgrated build-in screws. The excellent anti winding performance can make the flag fly freely in the wind and prevent the flag from winding the flagpole. | Premium Aluminium Alloy & Stainless Steel Material: Flag Pole Rings Swivel Ring Part and Screws are made of stainless steel, other parts made of high quality aircraft grade aluminum alloy, enough strong & durable, last and no rust, make sure hold up in weather and time. | Upgraded Stainless Steel Carabiners: Designed for flags with grommets, comes with 2 pcs strong and sturdy stainless steel carabiners snap hooks for connecting flagpole and the flag with grommets; Easy to install, according to the diameter of your flagpole, select the appropriate screw; slide flagpole rings up your pole, tighten the built-in screws and clip on your flag. Note: Please don't pull the flag too tightly between rings.