Our grip strength trainer is made of High-quality plastic and reinforced metal alloy materials, durable and safe.  DURABLE & DEPENDABLE GRIP STRENGTHENER. Our grip strengthened is made of heavy-duty plastic and reinforced metal alloy materials. Durable and safe, it will not damage your hands and fingers, which will bring you an excellent user experience. ERGONOMIC DESIGN & PERFECT FOR EVERYONE. No matter you’re women or men, kids or adults, beginner or an experienced person, you can start grip training anytime and anywhere. Suitable for all age groups and fits well for all hand sizes. Hand gripper is ideal for improving strength, power and speed in the wrists, fingers and forearms. Ideal for athletes, musicians, rock climbers, golfers and tennis players.  DIAL EASILY ADJUSTS RESISTANCE. Keep your routine moderate or amp it up with the adjustable resistance; from 5 - 60 kgs, suitable for different training levels. Simply turn the quick knot exercise.