For Bright-sama: IRONMIND Captains of Crush Hand Gripper

IRONMIND Captains of Crush
Hand Grippers
The King of Authentic Hand Grippers
Purchased and used a few years ago.
I did not use them intensely, so the actual usage period is only a few months.
⭐︎Immediate purchase is OK. The first buyer will be prioritized even if we are in the middle of a conversation.

3 types: Sport (approx. 36kg)
Trainer (approx. 45kg)
No. 0.5 (approx. 54kg)
The resistance levels are ideal for those aiming to strengthen their grip.
This is an excellent product, especially for those who already have a grip strength of around 40kg but are struggling to improve and are aiming for 50kg or more. Based on my experience, even if you already have a grip strength of around 45kg, I recommend practicing with sets starting from lower resistance.

The plating on the springs has some rust, but they have been regularly cleaned and are functionally sound. All three have been cleaned with spray and cleaner before listing. They are said to be a lifelong tool if used properly. I am open to selling them individually (for ¥3,300 each), but I would prefer to sell them as a set. Please review the images and consider purchasing if you are satisfied with the price and can buy as a set.