It is an extremely effective finger-hand-forearm strength and endurance trainer
It comes in 3 different levels of difficulty
It is very portable and easy to use, almost anywhere/anytime - at your desk, stuck in traffic, walking, on the treadmill, etc.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.7 inch
Height : 2.7 inch
Length : 3.8 inch

Item Weight: 4.8 ounce (View shipping rates and policies)
Shipping Weight: 4.8 ounce (View shipping rates and policies)

ASIN : B00MZM8D1E