Comes with 4 racks and 4 screws and 4 R rings. No Mat , no foam rollers Included. How to use : Step1 : Roll the mat as tight as possible with one elastic loop or rope (not included) Step 2: Install the rack on the wall as instruction. Step 3: Put the yoga mat on the rack and expand it or grip it to accommodate your need. Preparation: Roll up the mat, Keep the yoga mat unrolling with one elastic loop or rope (not included) to keep the mat as tight as possible. The out- diameter of the mat must be less than 8 Inches. Come with 4 bendable racks , 4 screws , 4 R rings to hold 4 small ,lightweight yoga mats or foam rollers - No mats or foam rollers included. If your mat is more than 3 LBS , Please Use TWO racks to hold one mat. No more than 3 Lbs (1.35KG)- The two pegs of the rack is bendable. Only hold up to 3 Lbs. If it is more than 3 Lbs, but less than 4 Lbs , 2 racks may be required to support one mat or foam roller. No Slipping - The pegs are bended to slightly inclined upwards to keep yoga mats and foam rollers from rolling off. You can bend it to fit your different sizes of mats. After you put the mat on the rack, You can press the two pegs forward to grab the mat better. Minimal Design - Clear Valuable Floor Space In Fitness Studio Or Home Gym. Great space saver for your gym or home. Easy access to foam rollers and yoga mats.