Hand grip and finger trainer booster with two-way adjustable spring for strength training piano guitar and finger exercise

Features:
1. Made of high ABS material, durable.
2. Practice finger dexterity and strength. Suitable for guitar, bass, piano, violin.
3. Hand exercise grip, a must tool for all music players.
4. Build strength, endurance, flexibility and coordination in a safe and comfortable way.
5. Comfortable finger pads and allow you to adjust individual finger tension from light to heavy, providing All-In-One hand Fitness for musicians.

Description:
1. Material: ABS
2. Size: 9x8cm
3. Applicable scene: Fitness equipment, Fitness

Package include: 1 X Hand Grip Finger Trainer

Notes:
1. Transition: 1cm = 10mm = 0.39 inch
2. Please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before you bid.