Read more Feel the Difference. Ball Bearing Hinges by FINSBURY HARDWARE. Not every door is worthy of a Finsbury Hinge. But if they could, they would. These hinges are specially designed for heavy solid-wood door applications. The hinges offer a spectacular finish that is sure to impress! 3" and 3.5" Hinge Applications While 3x3" hinges are usually used for furniture and windows, they are sometimes also used for doors that are less than 1-3/8" in thickness, and less than 30" wide. The added beauty and strength of a luxurious ball bearing hinge is sure to make a difference. Door Thickness 3" and 3.5" hinges are designed for doors that measure up to 1-3/8" in thickness. For thicker doors, a 4-inch hinge (or larger) should be used. Door Width 3-inch hinges are designed for doors that measure up to 30" wide. 3.5" hinges are designed for doors that measure up to 32" wide. 4" and 4.5" Hinge Applications The most popular door hinge size today is the 4x4 inch hinge - this is the standard size hinge that is found in most home interiors. 4.5-inch hinges are just a bit larger and offer extra support for heavier doors. The added beauty and strength of a luxurious ball bearing hinge is sure to make a difference. Door Thickness 4x4-inch hinges are meant to be used for doors that are 1-3/8" in thickness. For thicker doors - 1-3/4" and up, a 4.5" (or even larger) hinge should be used for optimal results. Door Width Both 4x4" and 4.5" can be used for door up to 36" in width. 5" Hinge Applications 5x5-inch hinges are meant to be used for doors that are 1-3/4" in thickness, and up 48" in width. Door Thickness: up to 1-3/4" thick. Door Width: Up to 48" doors. Brass Hinges + Tips The 3" and 3.5" Hinge The 4" & 4.5" Hinge The 5" Hinge (function(f) {var _np=(window.P._namespace("AplusModule"));if(_np.guardFatal){_np.guardFatal(f)(_np);}else{f(_np);}}(function(P) { // register javascript with unique module id P.when("jQuery", "AplusModules-module-6", "ready").execute(function($, hoverModule) { hoverModule("aplus-module-6-1"); }); })); Features Ball Bearing, Strong, and Secure Enjoy the smoothness of two non-detachable ball bearing mechanisms. Your doors will open and close like a dream. The hinges are equipped with high-quality, rust proof steel pins that will stand the test of time. Timeless Beauty The hinge of choice for architects, builders, and designers. You will see the difference as soon as you open the package. Beautiful Coated Finish Each hinge is carefully finished to ensure a perfect experience, so that they are sure to wow every guest to your home. Read more Door Hinge Locations: Most doors you see will have only 3 hinges, but taller doors can sometimes have 4. The U.S. standards commonly used in construction are as follows: The top hinge usually is installed 5-inches down from the top edge (jamb) of the door. The bottom hinge is installed 10 inches up from the bottom edge of the finished floor. The third hinge is centered between the top and bottom hinges. Number of hinges per door: As a general rule, you will want to use 1 hinge per every 30 inches of the door (or fraction thereof). Door Height: Doors up to 60 inches need 2 hinges. Doors over 60 inches, but not over 90 inches, need to use 3 hinges. Doors over 90 inches but not over 120 inches, 4 hinges are recommended.