Adult Classical Wooden Toys Educational Toys Kongming Lock Chain IQ Brain Teaser

Specification:

1. Item:?Kong Ming Lock;
2. Material: wood;
3. Size: 6.5 * 6.5 * 6.5cm;
4. Weight: 150g;

Features:

It has very mysterious mathematical and physical principles, even if it is disassembled in a short time, it is difficult to fight back.

Package Include:

1 *?Kong Ming Lock??