About this itemUNIQUE DESIGN - Two Strength Levels in One Device. To bring you more convenience, we Adaliven designed a RECTANGLE INSIDE AND ROUND OUTSIDE Grip Strength Exerciser. You can make grip strength training with different strength levels by adjusting the direction of StrengthenerHIGH-QUALITY SILICONE MADE - This material will give you MAXIMUM PERFORMANCE - COMFORTABLE AND DURABLE, perfect design for your hand or your fingers. The whole product is WASHABLE and can be used frequently and comfortablyFITNESS & SPORT ENTHUSIASTS - Strengthen your wrists, improve the dexterity of your fingers, increase the strength your hands while reducing fatigue. Help balance your grip muscles and your expanding muscles. 20/30 LBS for young girls and boys use, 40/50 LBS for normal life hand strength exercise use, 70/80 LBS for professional athletes useREHABILITATION & PREVENTION - Great for rheumatoid arthritis, carpal tunnel, tendinitis, tennis elbow and are on the way to recover from a fractured or broken wrist, or when you type, text or any other activities which use your gripping muscles. It's a very good gift for your health no matter you are outdoor worker or office staffWHAT YOU GET - 3PCS Hand Stretchers (Total 6 resistance)