Swiss Army style keyring.
Remixed from Mark Bensons V2 with thumbnail cutouts.
Changes: thumbnail cutouts elongated slightly, keyring hole reinforced through expanded size and ribbing, and corners chamfered instead of rounded.
Still uses M3 bolts, washers and nuts to assemble.
Wanhao Duplicator i3 / Cocoon Create
Place keys with an M3 washer in between each. Don't over tighten or keys wont move. Don't over tighten centre bolt or sides could snap.