Already using our JCSFY Crown Molding for IKEA Billy bookcases? This corner upgrade kit is the missing piece to handle 45-degree turns cleanly and securely—without the need for screws. Comes with a single 45 degree corner crown piece (two needed for a full 90 degree corner)
⚙️ How It Works:
Connects two Billy bookcases at a 45° angle
Designed to work only with JCSFY Crown Molding pieces
Installation tip: Attach the corner molding to one bookcase, then lean the second bookcase into place for a snug fit
💡 Why You'll Love It:
Makes your bookcases look like custom built-ins
Converts your existing JCSFY molding—just add this part!
Strong and stable without extra hardware
⚠️ Compatibility Note:
This kit is not compatible with IKEA Billy doors—it’s designed for open shelving only.
Not compatible with the IKEA Corner Metal Bracket
⚠️ Listing Reminder:
This is the corner upgrade only. Be sure to pair it with our Crown Molding listing for a full setup.
