This is a cat corner scratching post that I designed to attack to the IKEA ADILS legs onto the IKEA LINNMON desk top. I use to have that desk setup, however I do not have the photos of it attached. I had it on the South-East corner of the desk. I added the pictures of how it would look, but it isn't the right desk.

There is an optional hole on the top to feed the Sisal Rope 1/4 Inch. I just hot glued the rope following the grooves on the model. No additional hardware is needed, it uses the bolts on the leg itself.