This is an attachment for the Pioneer Pet SmartCat The Ultimate Scratching Post (best selling scratching post on Amazon). It has a hole for the existing 5/6" wood screw to secure it on the top. I tied fishing line to the toy, sat on the couch, and got the cat to climb up on the scratching post with this 3D print. This can be used to train them to use a new scratching post or solely for entertainment. You can also attach it to a different surface.