HIGH LOAD-BEARING: Be different from traditional door hinges, our hidden door hinge is a unique design structure of up and down link, replaces to traditional door frame butt hinges, which are supported by the bottom arm and floor instead of the frame, thereby reducing stress on the frame. It can withstand a weight of 100kg/220pounds.EASY TO INSTALL: It comes with 10 stainless steel screws. Our instructions list each step of the installation, and if you follow it, you will easily install the pivot hinges.PACKAGE INCLUDED: 1 set of L Shape Pivot Hinge, 10 pcs Screws.PERFECT FOR HIDDEN DOORS: This pivot hinge works great for building a hidden door. And the door pivot hinge can 180 degree rotation. Great for Bookcase Door, Bookshelf Door, Cabinet Door, Panel Door and etc.EXCELLENT SERVICE: To ensure quality, each of our pivot hinges undergoes strict quality control before leaving the factory. If you have any questions about our pivot hinges, please contact us with no hesitation, we will reply you within 24 hours and give you a satisfactory solution!STURDY METAL CONSTRUCTION: The pivot hinge is made of high quality stainless steel, which was welded by professional welders. Excellent process makes door hinges rustproof, corrosion resistance, sturdy and durable.