UGEARS Safe Mechanical 3D Puzzle DIY Wooden Construction Set;

UGEARS Safe is a mechanical 3D puzzle, a self-assembly model with no glue or any special tools (the parts are ready-made and can be simply removed from the board). To be assembled according to the manual.

Features
Real safe with combination lock (3-number combination).
Apart from being a nice gift, you may place one more gift inside it and then lock it.
One may try guessing the combination by rotating the handle and listening to the sounds it makes.
You may open the safe by entering the secret combination provided.
The combination can not be used to unlock another safe.

Unlocking the Safe
First, set the code lock to zero: rotate the handle counterclockwise (to the left) once or twice. Now you may enter the comobination:
Rotate the handle counterclockwise (to the left) till the first number from 1 to 9. Stop there.
Rotate the handle clockwise (to the right) till you get 0. After you pass through 0 continue rotating the handle to the right till you get the second number from 1 to 9. Stop there.
Rotate the handle counterclockwise (to the left) once again till you get the third combination number.
If the combination is correct, when you enter the third number the safe will make a cracking sound and open.
Short instructions: rotate left till the first number, rotate right through zero till the second number, rotate left till the third number.
Locking the Safe
To lock the safe again just close the door, rotate the handle counterclockwise (to the left) and the lock will close.

Technical Specifications
Material: plywood
Model size, l×w×h: 196 × 185 × 176 mm
Internal space, h×wvd: 155 × 140 × 105 mm