From puzzle master Nobuyuki Yoshigahara: "The idea for this puzzle comes from the 'Horse' puzzle, also available in the Cast Puzzle series. The 'Horse' puzzle was derived from a puzzle attained in California, one that was made with real horseshoes. With the W-U puzzle, the difficulty is ramped up considerably over the original 'Horse' puzzle. I hope your frustration level ramps up, as well. The key word is 'hoof'. " Hanayama is known worldwide for challenging puzzles and quality manufacturing. Can you take the pieces apart, then put them back together again? Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 3 puzzles are considered moderately challenging by most puzzlers. Recommended for 1 player, ages 12 and up. Made in China. Package dimensions: 4.750 x 3.000 x 1.750 inches. 2 pieces. Includes 1 Puzzle. Wipe clean with dry or damp cloth. Imported Material & Care Plastic Spot clean only