Strauss Adjustable Hand Grip Strengthener, (Black/Blue) and Chest Expander with 5 Springs Durable construction & ergonomic design Adjustable resistance - hand grip strengthener can be adjustable from 22 to 88 lbs (10 to 40 kg), it can satisfy different power levels, from the beginners to the advanced Portable upper-body workout equipment for exercising any-time, anywhere. Made with chrome steel and wooden handles for enhanced quality and durability. The five spring cables instead of normal 3, brings added resistance level for a more strenuous workout.