1.Safe to Use Our pulley is designed with a repeatable design that ensures a super loadbearing capacity of up to 440 lbs. It is durable and will not deform, making it for longterm use. Recommended for ages 5 and up, you can rely on it with confidence on all your highintensity slacklining adventures. 2.GREAT DURABILITY By incorporating wearresistant washers and six rollers used internally, our pulley prolongs the life of bearings. No friction between bearings delivers stable and smooth performance. Each bearing steel roll is meticulously selected during the design process. 3.Easy installation: simply connect the pulley to any kit and then note a unique accessory or regular one. The locking triangle carabiner ensures a and stable setup. Enjoy a smooth glide with minimal friction and optimal tension. 4.Ease of Use By setting up this pulley at a slight inclination, children can have fun while increasing confidence and courage. It is easy to use and allows hours of entertainment and helps build upper body strength and core. With its yet challenging speed, even beginners can enjoy the fun.