Come and Check Our Branding Solutions.This is a dolphin-like finger strength trainer and grip strength trainer. It is made of ABS and high-strength steel springs.It is small in size, easy to carry and can be carried everywhere. High strength spring makes the product itself resilient, not easy to damage. The groove design conforms to the ergonomic design, it makes the finger pressing comfortable. It's suitable for guitar, piano, wind and other practitioners as well as writers, rehabilitation trainers. Pls check inventory and detailed info before placing your orders.