DURABLE QUALITY: KNOBWELL 3.5 Inch Self Closing Door Hinges are made from high-qulity iron, with Black finish. Thanks to our own QC department, the black door hinges have passed 24 hours salt spray text and can be used for long-time, not easily to rust.
EASY INSTALLATION: With all the necessary parts and instruction paper included in the package, we can install/replace the hinges by ourselves easily and quickly on wood, metal, interior, exterior, residential, or commercial doors.
SELF-CLOSING FUNCTION: The adjustable door hinge is equipped with auto-closing function, which means the cabinet/door can be closed consistently without manual closing. With the help of included tools, we can adjust the tension of the internal spring to control the cabinet/door's self-closing speed.
WIDE APPLICATIONS: A pair(2 pack) of hinges can support doors of 70-80 lbs. We recommend you install as least 2 hinges for each door and 3 hinges for doors from 80 lbs. This self-closing door hinges are spring-loaded and heavy duty, which can be used on different doors including bathroom/kitchen/bedroom/store room/garage doors. Let your hands free!
QUALITY PACKAGING: Each hinge is individually packaged, 6 mounting long screws, 6 mounting short screws and detailed installation instruction are also included. Believe in KNOBWELL and we will offer you 100% satisfaction.