The hinge is small in size and has a bearing force of 90 degrees, which can occupy a large space. ; Easy to install - anyone can install it with a screwdriver, no drilling required Features: Made of heavy duty steel to withstand heavy loads, ideal for wooden doors/interior doors, ball bearing hinges are popular for their smooth operation, durability and can withstand higher loads than standard hinges. Usually used for interior doors. Typically used on wooden or thick glass doors To ensure that fire doors remain closed in the event of a fire Suitable for extractor door sets Smoke Product Name: 90 Degree Concealed Sliding Hinge Limit Hinge Performance: Maximum Radial Static Diameter: 625N Average Democratic Limit Coefficient: 420N Maximum initial static diameter: 205N Maximum average limit coefficient: 204N Maximum retention coefficient: Packing of 18.2N recessed cabinet door: 2 pieces