This is a yoyo. It goes up and down and sometimes it bites. I can't be held liable if it eats some of your yoyo string. 

It uses a 4mm x 20mm stainless steel shelf pin as the axle. These are the ones I used. https://www.amazon.com/gp/product/B0D1VF3P4C I recommend a tiny drop of super glue in the axle hole then the pin, then the other half with glue as well. If you want it to work well slice it to 54-60 grams weight. 

The Ork face has an actual purpose and functions as the response system, what makes it go up and down. This has a very unique feeling response system, you can feel the teeth on throw and pull.