Center hung pivot set. For interior or extreior doors. Max door weight 1000 lbs. Max door size 4 Ft.0 In. x 8 Ft.6 In. Non-handed. Includes H340 top pivot. Bottom pivot is mortised into floor. Special side load arm for 1-3/4 In. thick doors or for moving pivot point toward lock edge of door. Pivot point centered in thickness of door.