Product Specifications: 4" x 4" square corners - Made of Heavy Duty Steel with Polished Chrome FinishFor use on Residential Entry and Commercial Entry DoorsTypical use: 1 5/8" to 1 3/4" thick doorsBall Bearing Type, Steel Plated, Gauge 3.3 MM, Includes matching screws (both wood and machine screws)2 Pack - Sold in Pairs - What is a pair?Our hinges are compatible with most brands of hinges including Penrod.Don't forget to purchase some extra long wood screws if you are replacing your old hinges. These are specifically manufactured to help align your doors and insure that the hinges will hold in place. We have multiple finishes available including Satin Nickel, Stainless Steel, and Oil Rubbed Bronze for commercial hinges. | Commercial Ball Bearing Hinges Hinge Outlet 70265