PDQ Butt Hinges - 4 Ball Bearing - Stainless Steel

4 Ball Bearings for heavy weight applications. Stainless steel for exterior and corrosive environments. PDQ Butt Hinges are a secure and long-lasting solution for mounting commercial doors. Features Size: 4-1/2” x 4-1/2” 5 Knuckle Non-Removable Pin Groove in pin accepts set screw in center barrel Set screw secured using a 3/32” hex (allen) wrench and is not accessible when door is closed Specs Stainless Steel Applications: Exterior and corrosive environments All hinges packed with Machine Screws (12-24 x 1/2” FHMS) and Wood Screws (12 x 1-1/4” FHWS) Five (5) year limited warranty Finish  Stainless Steel 630/US32D Installation Challenge Level  EasyAnyone who can read instructions and use basic tools can install this product.