Photo 1 of Bearfire Hidden Door Hinge Kit - Heavy Duty Pivot Hinge 620LB Load-Bearing Thickened Stainless Steel, 360° Silent Rotation Hidden Door Hardware, Hidden Door Hinges for Secret Door/Hidden Door Bookcase

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Photo 1 of Bearfire Hidden Door Hinge Kit - Heavy Duty Pivot Hinge 620LB Load-Bearing Thickened Stainless Steel, 360° Silent Rotation Hidden Door Hardware, Hidden Door Hinges for Secret Door/Hidden Door BookcasePhoto 2 of Bearfire Hidden Door Hinge Kit - Heavy Duty Pivot Hinge 620LB Load-Bearing Thickened Stainless Steel, 360° Silent Rotation Hidden Door Hardware, Hidden Door Hinges for Secret Door/Hidden Door Bookcase