If you often don't know how to release the fingers' fatigue or improve grip strength, I recommend the Finger Extensor Resistance Band to you. It comes with separated five fingers holes design, you just put fingers into the holes one by one, from thumb to little finger, and stretch them outwards slowly to maximum, then take them back. Repeat above steps again and again, which helps you train finger's muscle for getting a better grip strength. Sounds great? Try it!
Effective fingers grip strength exercise for better working, sporting, etc.
Streamlined five fingers holes design for perfect use
Three grip strength exercising levels for choosing
light blue - 6.6LB; blue - 8.8LB; deep blue - 11LB
Soft silicone material with great flexibility and toughness