Who invited the thumbs to the party?
A classic training tool for engaging the thumb and improving pinch strength.
The 2" x 5" and 3" x 4" are the most popular sizes, often used in armlifting competitions. The larger sizes are great for bigger hands or for the brave folks wanting to test their limits.
Pinch blocks are critical for climbers, especially for those who do a lot of gym climbing where larger and more open-handed pinches are commonplace.
Other shapes and sizes can be requested!