door pivot hinge is to support much heavier doors than the typical butt hinges. They are supported by the bottom arm and the floor instead of the door frame which reduces the stress on the frame. This door pivot hinge can 360 degree rotation, widely use in bedroom, livingroom, mansion, tall building rotary door and so on. Top pivot with retractable pin, for easy installation. Bottom pivot with sphere. Weight: 455g. For door weights of up to 250 lbs. The floor bears the full weight of the door rather than door hinge 1. 2.Adjustable ,The door is removable 3.They are supported by the bottom arm and the floor instead of the door frame which reduces the stress on the frame. 4.Top pivot with retractable pin, for easy installation 5.idely use in bedroom, livingroom, mansion, tall building rotary door and so on. colour:Silver Material:stainless steel Package Contents: 1 * set of Door Pivot Hinge System NOTE: This item does NOT come with mounting screws. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.