Product Description: Maximum force: 60LBS. Index: 2LBS, weight: 156g There are three types of pinch force: 1. tip pinch thumb finger tip to index finger tip; 2. key pinch thumb finger palm to index finger side; 3. palmar pinch thumb finger palm to index and middle finger finger palm; The amount of finger strength in a normal person's fingers is related to gender, age, and right or left hand.