Size: 142*60*90 PROMOTES HAND HEALTH AND RECOVERY: The grip trainer can help make fingers stronger after a hand injury or surgery, help seniors increase repetitions, have additional benefits for hand injury recovery, increase strength and flexibility. 3D sharp points to enhance blood circulation: This grip ball will improve your blood circulation and is a great hand exerciser for guitarists, pianists, people who type, drive, write and climb a lot, great for stress relief and reducing stress and anxiety. FOUR FINGER SEPARATION ANTI-DROP DESIGN: Our pressure relieving squeeze ball offers an ergonomic oval design for muscle massage for athletes and musicians, with 4 fingers separated and securely fastened to prevent finger contractures and deformities and will not fall off due to the patient's inflexible fingers. Safe & comfortable material: Our grip tool is made of high quality TPR material, which is healthy and environmentally friendly, with 3D high elasticity touch, which can be squeezed and pressed at will, skin friendly, elastic and will not deform in long term use. PORTABLE & EASY TO WASH: Our decompression squeeze ball is used for muscle massage for athletes/musicians, strength training, light weight and small size, can be used at home as well as in the gym or anywhere, suitable for many occasions such as school, office, etc., easy to clean and odourless.