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Manufacturer Description
Features: World First 5 pressing keys to practice finger-interval Precise design for spring structure with copper nut and screw, and the product has a lifetime warranty Visible physical force adjustment, you can see the change while practicing Intensify your practice for specific finger with exclusive "key-hold" feature Widely used for finger exercise when you play guitar,piano or orchestral instruments
Notice: There might be 1-3cm(0.39-1.18inch) deviation due to manual measurement. There might be slight colour deviation due to different display.
Package includes: 1 * Hand excerise 2 * Button
Product Features
Isolates and exercises each finger individually for strength, dexterity and endurance
Precise design for spring structure with copper nut and screw
Visible physical force adjustment, you can see the change while practicing
Intensify your practice for specific finger with exclusive "key-hold" feature
Widely used for finger exercise when you play guitar,piano or orchestral instruments