Here is whole new world behind each door, when you open it, a strong,smooth, safe door without any stuck is necessary, Undoubtedly,our hinge is your best choice.<br><br> Category: Commercial&Residential Full Mortise Hinge<br> Product: Hinge 4.5" x 4" Square Corner<br> Hinge Size: 4.5" x 4" (115x 102 mm)<br> Hinge Radius: Square Corners<br> Ball Bearing: 4 Ball Bearings<br> Finish: Stainless Steel Finished<br> Material: 304 Stainless Steel with Stainless Steel Pin<br> Hanging: Use on Medium Weight Doors or Doors Requiring Medium Frequency Service <br>Knuckles: 5<br> Holes: 8<br> Removable Pin: No