If you have a rack and looking for a band attachment,The fixing buckle of the tension training device installed on the squatting frame. The O-ring attachment for power rack.Accessories are made of high carbon steel. It conforms to the national standard and is durable. You can do all kinds of resistance-band workouts with power rack; dynamic bodyweight training systems, and many other items. Accessories are suitable for squatting frame with width of 2 "* 2" and aperture of 1 "2.5cm The fixing buckle of the tension training device installed on the squatting frame. Easy installation and position adjustment at any time,Installation is as easy as finding hole to install and tightening two parts The ring attachment has a wide range of applications, can be applied in any exercises with resistance bands, suitable for adults, youth and other fitness enthusiasts. If you have any questions about our products, please feel free to contact us That it is a closed ring so the band has no chance to slip off. The fact that it uses a screw to secure to rack adds much needed security and stability. Having this attachment has allowed you to add more variations to your workouts.