Hand Grip Finger Trainer Finger Training Grip Strength Trainer Grip Strength 21LB Strength Training Stress Relief ……………………………………………………………………… Strength: Adjustable in 3 levels from 13LB to 21LB. Product Size: Length 12cm x Width 11cm, Hole Diameter 1.8cm, Height 2.8cm. [For Step-Up] With 3 adjustable resistance levels, you can train the strength, dexterity, and endurance of individual fingers. If you feel your grip strength has improved, you can gradually increase the difficulty. …………………………………………………………… ☆ No need to ask before purchase, purchases at night are OK ☆ We respond as quickly as possible. ☆ Returns after purchase are not accepted, so please check the actual photos before purchasing. ☆ Depending on the product, the shipping method may be changed, so please understand. ☆ Since cancellations are not possible after evaluation, please check the operation and size before evaluation. 18-2200429