Grip Strength Trainer Kit – 5 PCS Hand & Finger Exerciser Set Adjustable 5-60kg

Finger Exerciser – Trains each finger individually for balanced strength; great for guitarists, climbers and keyboard users. 1 × Finger Exerciser (approx. 8.5 × 7.8 cm). Adjustable Hand Gripper (5–60kg / 11–132 lbs) – Turn the dial to set your resistance.

eBay