Bi-Folding and Hydraulic Doors Ask An Expert Request a Quote Request Service Or give us a call: 1-888-606-9415 If a clean look and quiet operation are what you need, Bi-Fold Doors and Hydraulic Doors are a great solution for your architectural design. Whether for a restaurant, bar, office building or commercial facility, bi-folding and hydraulic doors provide a great option when you are looking for great visibility and minimal obstructions. Push-button or key-switch operation provides extreme ease of use, and the near silent operation will not interrupt the ambiance of your environment. We sell and install both Crown Doors and Schweiss Doors. Each offers top-notch doors that will not only fit your space, but magnify it. Contact your McKinley expert today for more information.