The JW Cuttlebone Holder is the first of its kind to meet your pet bird's needs. No more difficult wires. The simple screw-on plastic bolt on holder can be used easily on vertical or horizontal barred cages for your pet bird and will hold any type of cuttlebone for your pet bird to enjoy. It holds cuttlebones in place with a plastic barrier to ensure that it doesn't move while your bird eats. An additional piece of plastic protruding from the holder makes the perfect perch for your bird to use as they enjoy their meal and includes a pocket to catch debris and fragments from falling outside of the cage to make clean up easier. Cuttlebones are the simplest way to give your pet bird the trace minerals and calcium they need to keep their beaks strong and healthy. Holds all types of cuttlebones. Great for parakeets, canaries, cockatiels, budgies, and finches. Dishwasher safe birdcage accessory.