This 3.5" x 3.5" black door hinge is designed for interior residential doors and features 5/8" radius corners for a clean, finished installation. The black finish offers a modern look that pairs well with today’s popular black door knobs, levers, and other matching hardware. The hinge is ideal for replacing existing residential hinges or installing new interior doors. Its full mortise design provides a flush fit between the door and frame, while the included matching screws make installation simple. Specification Details Hinge Size 3.5" x 3.5" Finish Black Corner Radius 5/8" Radius Corners Hinge Type Full Mortise Butt Hinge Material Steel Pin Type Removable Pin Mounting Style Mortise Mount Screw Holes 6-Hole Template Screws Included Yes Recommended Use Interior residential doors Door Thickness Typically used on 1-3/8" interior doors Package Contents Door hinge and matching screws .