LOYELEY Finger Trainer Resistance Training Band for Guitar Bass Banjo Piano Strengthening Finger Distance Adjustable Finger Speed System Hand

[About clocks that synchronize time via radio waves] The function of clocks that synchronize time via radio waves only works in the Japanese area. Please be careful. [Set contents] Set of 5 pieces. Size: 92mmx 17mm x 3mm. Color: Black. [High-quality materials] Made of soft and malleable ABS plastic, you won't have to worry about damaging your hands even after using it for a long time. [Finger expansion] Effectively solves the problem of finger softness and weakness, hand collapse, and insufficient finger span. [Free Adjustment]: You can freely adjust the exercise interval of the finger expansion sleeve, and it can be adjusted according to each person's finger condition. [Widely Applicable] Perfect for finger speed training for bass, guitar, piano, banjo, all string instruments, brass instruments, and woodwind instruments.