This is the solution for those who want to remove the cap of a hollow metal yo-yo without damaging the body or cap....

Simply attach this valve to your yo-yo, place it in the air container of your bike or motorcycle, and blow air into it to easily remove the cap.

Compatible with Freehand AL, Butterfly AL, and other bodies with cut M4 thread.

Air pump is not included. Please use a US style valve air pump.

If the cap is too tightly seated, the cap may fly off when it is removed (in severe cases, it may stick in cardboard).

It is easy to remove the cap, but it can be very dangerous if you are not careful. It is very dangerous to hold the cap in your hand to remove it by air pressure, or to work with it as it is, because the cap and the main body will explode. When removing the cap, please fit the sponge part of the yo-yo back and remove the cap while the lid is tightened. Wrapping with towel is also effective, but if you don't wrap it properly, it will result in the body floating up and bouncing in an unexpected direction.

使用例（プロトタイプのアダプタを使用しています）

ダンボールなどの中でキャップと本体を固定せずに外すとキャップが跳弾をして本体に跳ね返り傷を作る場合があります。安全について十分考慮して、回りに壊れやすいものや人がいない状況で安全対策をきちんと講じて作業できる人のみご購入ください。

使用に伴う破損、怪我等は自己責任となりますのでご注意ください。