X-Frame Spotting Rail is designed to catch the barbell if you become unstable in a squat, and allows you to perform squats safely without a training partner. Coming in a pair, they can be used with the X-Frame Upright. 

The X-Frame series is the latest in squat rack design. Combining high durability, extreme strength and industry leading stability, the Australian engineered design is made from heavy-duty commercial 65mm x 65mm steel tube. The flexible modular features ensure X-Frame components and accessories can adapt as your training schedule requires.