Zhejiang Oproller’s Sliding Door Rails are manufactured for doors that weight approximately fifty kilograms. The robust construction of these sliding door rails incorporates thick-walled steel and reinforced parts which allows them to support industrial-grade, commercial, and even some residential sliding doors. Furthermore, the precision-engineered rollers and tracks provide effortless movement and smooth operation, even with extreme loads. Our in-line…suffers from an extreme muscle imbalance between flexor and extensor pairs. They do not even come close to matching the strength and endurance they will utilize. Heavy-duty rails are unparalleled in their strength and reliability.