Challenge your mind with our Safecracker 40 Puzzle! Perfect for math lovers, this mid-level difficulty puzzle is designed to entertain and engage teenagers and adults alike. Features: Objective: Align four puzzle wheels so all 16 columns equal 40 Material: High-quality alder and maple wood with laser-engraved numbers Size: 4.4" diameter base wheel Craftsmanship: Handmade in Hudson, Florida Durability: Laser-engraved numbers won't smudge Family-Owned: Proudly crafted by Creative Crafthouse, a small family business Ideal For: Math enthusiasts Puzzle collectors Brain teaser lovers Enhance your puzzle collection with the Safecracker 40 Puzzle and enjoy hours of brain-teasing fun!