Trick Bolt #2 Puzzle

Made from solid brass and designed to look like an ordinary bolt, Trick Bolt #2 hides a completely different mechanism from the first puzzle in the series. The challenge is to figure out how to remove the nut and free the ring. Solving Trick Bolt #1 won’t give away the secret, this version requires a different approach and has a surprise of its own. 

Object: Remove the ring
Difficulty: 7/10, Challenging
Material: Solid brass
Dimensions: 3 × 3 × 9.9 cm
Brand: Puzzle Maste