5 pressing keys to practice finger-interval.
Precise design for spring structure with copper nut and screw, and the product has a lifetime warranty.
Visable physical force adjustment, you can see the change while you practise.
Perfect tool for pre-show warm-ups and maintaining conditioning when away from your instrumen
Widely used for finger exercise when you play guitar,piano or orchestral instruments.

Technical Details

Product Details

Package Dimensions
Width : 4.9 inch
Height : 1.3 inch
Length : 6.1 inch

Shipping Weight: 4.8 ounce (View shipping rates and policies)

ASIN : B01ILVYQPO