1. RECOMMENDED: Hand yoga is being used many in fields such as musicians, physical therapist, doctors, and technicians for their healthy hand and finger. 2. HIGH GRADE MATERIAL: Finger band is made of silicon with great elasticity and high grade neoprene and strap make the product perfect for anyone! 3. BEST HAND EXERCISER: You can train fingers individually or together with different tension force applied. 4. ERGONOMIC DESIGN: This perfect design leads you maximize of range in exercising. Adjustable wristband can be anyone with comfortable fit, regardless of wrist circumference. 5. COST EFFECTIVE: Do not have to buy other item for your hand training. You can use it for your right and left hand training both with simple way at any place. Who needs hand yoga? Physical/rehabilitation therapist. Doctors, technicians, etc. who need elaborate manual labor. A musician like pianist, violinist, etc. Occupations that frequently use computer keyboard such as office workers. Specifications: Name: Finger Extensor Exerciser Tension: 40lbs Material: Silicone colour: Blue Package Contents: 1 x Hand Grip Strengthener Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.