This hook is designed for the popular IKEA Billy Bookcase. It is a sleek, functional accessory designed to hold headphones or other similar objects securely while making use of otherwise unused space on either side of your Billy bookcase. This innovative hook seamlessly attaches to the vertical edge and a shelf of the bookcase, providing a convenient, hands-free storage solution for your headphones. Left, Right hook profiles included.

Update:  Due to an observation, 3 new Profiles have been added for those with a slightly larger horizontal shelf thickness.  The added Left, Right, or both Profiles have a 21mm shelf thickness capability.  Up from 19.55mm in the original profiles.