BOXPT Wooden Gymnastic Rings are ideal for most acrobatic and gymnastic movements. They are portable, versatile and easy to install. Made of high-quality birch, they feature a textured surface, are naturally adherent, with or without the use of magnesium. In addition, they include durable 3.7-cm wide nylon straps and a buckle system, allowing for quick installation and easy adjustment both outdoors and indoors.