About this 3D model

Keychains and spinners are cool gadgets. why not combine them in a single object? you will need 2 M3 screws (long enought to hold all your keys), 2 M3 self-locking nuts and two 5x10x4mm bearings (You can find bearings here http://www.ebay.com/bhp/5x10x4-bearing​).