Computer Table Concealed Hinge: Our cabinet door hinges small pack produces a flat surface flush with the cabinet bottom. These adjustable cabinet hinges are great for a computer desk that requires a flat surface! 900 Opening from Vertical to Horizontal: These soft close hinges will not work on slanted drop fronts, only close to 900, totally concealed when closed, and 900 opening from vertical to horizontal. Durable Material: Our hidden hinges for cabinet doors and computer tables are made from premium zinc alloy, which is of strong strength and long durability. This cabinet door hinge fits perfectly and is very solid and beautifully made. Easy To Install: Just loosen the larger of two adjustment screws to separate the horizontal door hinge into its separate halves. Install the concealed hinges for cabinet doors into 35mm holes using the screws provided. Finally, reconnect and tighten the adjustable hinge. Suitable For? Our vertical hinge lift is perfect for computer desks, cabinets, and other small furniture. Only for use in combination with flat support. Fit exactly into the holes in the breakfront drawer. Thanks for all the great dimensional detail on the instruction pdf. Rockler Woodworking Nickel - Fully Adjustable Concealed Fall Flap Hinges: This 90 degree hinge permits the drop front to travel 90° to produce a flat surface flush with the cabinet bottom. Installing these small door hinges requires 35mm x 12mm deep holes. Our soft closing hinges pack is plated with zinc die-cast - nickel which is very strong and durable. Our drawer hinge is a replacement for broken hinges on computer desks. --- Hardware Cabinet hinges Easy Installation: The drop from goes into a closed position of the vertical hinge cabinet when raised to a vertical position. The drop front actually slides downward near 900 about 5/8" from the normal rotational axis. The front edge of the cabinet shelf will be partially covered by a drop front, and the hinge hardware is totally concealed from view. When the drop front is in the open position, the drop front will be horizontal and aligned with the cabinet. --- About Us: The history of Rockler Woodworking and Hardware goes back to 1954 when Norton Rockler started the Minnesota Woodworkers Supply Company in north Minneapolis. It was a small mail-order business with a big aspiration – to become woodworkers' go-to resource for everything they need to complete their projects.