Easy Installation: You can choose horizontal or vertical(right or left) installations. NO assembly required. The package comes with mounting screws, Allen keys, anchors, and brackets. Use included fixing screws to mount holder securely.Fits Big Roll: Max. length of paper roll is 4.92-inch. Projection is 3.15 inches. Holds even jumbo-sized rolls of toilet tissue. Large stainless steel knob at the bar end prevents toilet paper roll from falling off.