[Product Information]

• Relieve daily stress and strengthen your hands， forearms and fingers with simple exercises
• Increase flexibility， improve strength， prevent stiffness， and relieve joint pain in your hand， wrist， and forearm
• Comes with 3 different RESISTANCE levels (soft， medium and firm) allows you to start light and work up to your desired comfort
• Made of durable thermoplastic elastomer (Like Silicone) to handle any grip. No hard plastics and rubber or foam that rips. Reduces any stickiness or residue and easily cleaned with water rins
• The size of the hand exercise balls is 2.5" x 1.75" (6.3 x 4.4 cm)，benefits rheumatoid arthritis， rock climbing，carpal tunnel rehabilitation， golf， violin， tendonitis， handball， guitar， piano， tennis etc.