XIANQI STRONG LOAD-BEARING Unique design structure of up and down linkthe door is supported by the bottom arm and the floor rather than door hinge, pivot hinge is able to support much heavier doors than the typical butt hinges,weighting up to 110lbs/50kg DURABLE MATERIAL - Heavy duty pivot hinge is made of high-quality thick stainless steel, the hinge surface is polish treated and fine workmanship, it has excellent rust and corrosion resistance, strong and durable WIDELY USE The door pivot hinge can 360 degree rotation and hidden installation, it suitable for hidden doors, rotary doors, cabinet doors, wooden doors, metal doors, widely use in bedroom, kitchen, basement and so on EASY TO INSTALLATION The pivot hinge set contain all the mounting screwing, top pivot with retractable pin for easy to installation HIGH QUALITY MATERIAL concealed revolving door hinges are made of high quality stainless steel, corrosion resistant and rust free, ensuring longevity and durability. Sturdy, strong bearing capacity. FIXED SHAFT INTEGRAL MOLDING The shaft is stamped and fixed, tightly connected, and has good stability; one-piece molding design, screw adjustable design, strong and durable. FLEXIBLE ROTATION REDUCES FRICTION The product adopts solid stainless steel ball, which can reduce friction and avoid noise. Provides you with a simple and effective way to swing your door effortlessly and quietly. CONCEALED INSTALLATION, EASY TO USE The up and down link feature makes installation quick and easy; hinges that rotate to hide the door pivot can be installed on the top layer of the door and connected with holes in the door surface, it is almost invisible after installation. Specifications Material: Stainless steel Color: Silver Bear Weight: 110 lbs Size: length 130MM Product includes: 1 set x hinge