Premium Quality A Bolt from The Blue - Durable & Stylish Accessory for Outdoor Adventures, Hiking & Camping Gear

Remove the brass washer. Just remove the brass washer from the steel bolt.

This puzzle is made from a modified heavy, steel bolt and comes in a specially 3D printed case with a lovely (if we do say so ourselves) vinyl label.  It stands about 9.5cm / 3.5 inches tall in its case.