After going through most of the reviews ordered this product as it was Amazon's Choice too. Product was delivered on time and in tact. Starts wearing out after few days of usage. Regretting the order made for one more for my friends only after one day's usage..
Good 1) Adjustable upto 40Kg 2) Rubber grip
Bad 1) Spring tension reduces after few days usage 2) Joins starts wearing out in few days since it is made up of PVC
Build quality is good enough. This Hand gripper has marks of weights upto 40kgs, but metal spring is not enough strong with repesctive the mentioned weights on the Hand gripper. Metal spring should be little bit stronger and harder, then only we can feel some weight on hands while doing exercise.
The rubber on thr grip is eroding very fast. They need to provide better rubber. Also I notice that after 60 rounds, the iron spring becomes loose and does not provide 40 kg force. So they need to provide better iron/steel in spring.