These CRL Roton Half Surface Continuous Hinges have load bearing blocks every 5-1/8 inches (130.2 millimeter) on the Standard Duty Hinge, and every 2-9/16 inches (65.1 millimeter) on the Heavy-Duty Hinge. They feature a surface mount attachment to the door and a concealed mount attachment to the jamb. They are available in satin anodized and dark bronze anodized finishes, and stocked in 83 inch (2.11 meter) lengths. A pack of installation screws is included with each Hinge. Replacement Screw Packs are also available separately.