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This Promotion ends on 31 Dec

🇺🇸[Black] Revolutionary Open-Closed Signboard

$33.99$48.99Save 31%

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Just rotate the handle, and open and closed switch in a magical way.

It is a "revolutionary" open-closed signboard that combines interesting typographic tricks and a gear mechanism. 


  • Beautiful Structure

The first thing that will impress you is the beauty of its structure.  

The many parts are meticulously calculated and assembled to form a unique shape.  

You can see a wonder of engineering and an art of mathematics in the design of the signboard.

  • Convinent and Quick

It is not only a mere piece of invention, but rather a practical contraption.

It is more convenient and quicker to use than traditional signboards. It's easy to operate and solid enough to withstand daily use. 

  • Suit for Everyone

It is also a toy that can be enjoyed by both adults and children. Just watching it move is oddly satisfying.

It can be an educational toy that allows children to learn how gears work while having fun. 

A revolutionary open-closed signboard that everyone can use.


  • Material: Wood
  • Size: 10.2*5.9 in


  • 1* Revolutionary Open-Closed Signboard


Refund Policy

More than anything we want you to be happy with your purchase! If something doesn’t look or feel right, please contact us and we’ll make it right!


Also please be informed that placing an order means that you accept all the terms mentioned below.




If you change your mind about your purchase, please send us an email to, provide your order number and the modification you would like to make. We’ll confirm once the modification or cancellation has been made.


Your order is only eligible to be canceled and modified within the date of purchase. After that time, the order is locked for processing and no longer can be adjusted.


Please also be informed that a management, processing, and transaction fee (20% of your total order value) will be applied for the cancellation. 




For orders shipped to the wrong address due to a customer inputting the incorrect address:

- We are not responsible if your order gets delivered to the wrong address or returned to the sender (as all of the items would be destroyed right after they come back to the manufacturer's warehouse)

- Please be noted that replacements for these cases will not be free of charge so please be extremely careful when entering your shipping address.




Please contact us by email before opening a merchant chargeback or payment dispute, as we can generally resolve the issue before that takes place. Any chargebacks and disputes disable our ability to issue refunds or credits due to funds being frozen.




Customers have the right to request a refund/ return/ exchange within 14 days from the delivery date. Our Customer Service team will offer the best solutions for specific situations. 


Refund requests for used items will be refused. 


Please refer to our Exchange and Return Policy here to find more details about this.




After our Customer Service team confirms the refund to you, it may take 2-5 business days for the amount to be officially posted and reappear in your bank account. 


If you still do not receive a refund after this period, first check your bank account again. Then contact your credit card company to ask them to have an investigation.